Document:

<PAGE>   1
                                                                  EXHIBIT 10.15

                                 PROMISSORY NOTE

December 10, 1998                                                       $25,000

         FOR VALUE RECEIVED, KEN GAVRANOVIC, ("BORROWER"), promises to pay to
the order of INTERLAND, INC., a Georgia corporation ("LENDER") at Lender's
office located at 34 Peachtree Street, Atlanta, Georgia 30303, or at such other
place as the holder hereof may designate, the principal sum of TWENTY-FIVE
THOUSAND DOLLARS ($25,000), together with interest on so much of the principal
balance of this Note as may be outstanding and unpaid from time to time,
calculated on the basis of a 360-day year and actual days elapsed, at the rate
per annum indicated below.

         1. PAYMENT OF PRINCIPAL AND INTEREST. The principal balance of this
Note and accrued interest thereon shall be payable in full on demand by Lender.
Unless demand for payment is earlier made, accrued interest shall be payable
quarterly on the 1st day of the calendar month following the quarter in which it
accrues commencing on the 1st day of January, 1999, and continuing to be due on
the same day of each succeeding quarter thereafter until principal and interest
are paid in full. The provision of this interest payment schedule is not
intended, and shall not be construed, to affect or impair the demand nature of
this Note.

         2. INTEREST RATE. The unpaid principal balance of this Note shall bear
interest at a rate per annum of ten percent (10%).

         In no event shall the amount or rate of interest due and payable under
this Note exceed the maximum amount or rate of interest allowed by applicable
law (including, without limitation, O.C.G.A. ss. 7-4-18) and, in the event any
such excess payment is made by Borrower or received by Lender, such excess sum
shall be credited as a payment of principal (or if no principal shall remain
outstanding, shall be refunded to Borrower). It is the express intent hereof
that Borrower not pay and Lender not receive, directly or indirectly or in any
manner, interest in excess of that which may be lawfully paid under applicable
law. All interest (including all charges, fees or other amounts deemed to be
interest) which is paid or charged under this Note shall, to the maximum extent
permitted by applicable law, be amortized, allocated and spread on a pro rata
basis throughout the actual term of this Note and any extension or renewal
hereof.

         3. EVENT OF DEFAULT. During the existence of any Event of Default (as
defined herein), the unpaid principal balance of this Note shall bear interest
on each day until paid at the interest rate otherwise in effect under this Note
plus, in Lender's discretion, up to an additional five percentage points (5%).
All payments or prepayments on this Note shall first be applied to interest
accrued on this Note through the date of such payment or prepayment and then to
principal (with partial principal prepayments applied to installments in the
order of their maturity).

         The occurrence of any one or more of the following events will
constitute a default by Borrower hereunder (an "Event of Default"): (i) Borrower
fails to pay when due any amount payable under this Note; or (ii) if any
proceeding is instituted by or against Borrower alleging that Borrower is
insolvent, unable to pay Borrower's debts as they mature, or not generally
paying Borrower's debts as such debts become due, or if any proceeding is
instituted by or against Borrower under the Federal Bankruptcy Code or any
successor statute, or if any proceeding is

<PAGE>   2

instituted seeking the appointment of a receiver or trustee for all or any
portion of Borrower's property, or if any proceeding affecting the rights or
creditors generally is instituted by or against Borrower.

         Upon the occurrence of an Event of Default, Lender, at its option,
without demand or notice of any kind, may declare this Note immediately due and
payable, whereupon all outstanding principal and accrued interest shall become
immediately due and payable; provided, however, that upon the occurrence of any
Event of Default described in clause (ii) above, this Note, without demand,
notice or declaration by Lender of any kind, shall automatically and immediately
become due and payable.

         4. PREPAYMENTS. Borrower may prepay the principal balance of this Note
in whole or in part without premium or penalty. All payments or prepayments on
this Note shall be applied, first, to interest accrued on this Note through the
date of such payment or prepayment and then to principal.

         5. ATTORNEY'S FEES. If this Note is collected by or through an
attorney-at-law, all costs of such collection incurred by the Lender, including
reasonable attorney's fees, shall be paid by Borrower.

         6. TIME IS OF THE ESSENCE; WAIVERS OF RIGHTS. Time is of the essence of
this Note. Lender shall not be deemed to waive any of its rights under this Note
unless such waiver be in writing and signed by Lender. No delay or omission by
Lender in exercising any of its rights under this Note shall operate as a waiver
of such rights, and a waiver in writing on one occasion shall not be construed
as a consent to or a waiver of any right or remedy on any future occasion.

         7. GEORGIA LAW GOVERNS. This Note shall be governed by and construed
and enforced in accordance with the laws of the State of Georgia (without giving
effect to its conflicts of law rules). Whenever possible, each provision of this
Note shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Note shall be prohibited by or
invalid under applicable law, such provision shall be ineffective only to the
extent of such prohibition or invalidity, without invalidating the remainder of
such provision or the remaining provisions of this Note.

         8. WORDS. Words importing the singular number hereunder shall include
the plural number and vice versa. The word "Lender" as used herein shall include
transferees, successors and assigns of Lender, and all rights of Lender
hereunder shall inure to the benefit of its transferees, successors and assigns.
All obligations of Borrower hereunder shall bind Borrower's successors and
assigns.

         EXECUTED by the undersigned Borrower as of the day and year first above
set forth.

                                    /s/ Ken Gavranovic
                                  ----------------------------------------------
                                  KEN GAVRANOVIC

                                  Address:
                                          --------------------------------------

                                          --------------------------------------

                                          --------------------------------------

                                      -2-<PAGE>   1

                                                                   EXHIBIT 10.16

                                 PROMISSORY NOTE

December 15, 1998                                                        $25,000

         FOR VALUE RECEIVED, WALDEMAR FERNANDEZ, ("BORROWER"), promises to pay
to the order of INTERLAND, INC., a Georgia corporation ("LENDER") at Lender's
office located at 34 Peachtree Street, Atlanta, Georgia 30303, or at such other
place as the holder hereof may designate, the principal sum of TWENTY-FIVE
THOUSAND DOLLARS ($25,000), together with interest on so much of the principal
balance of this Note as may be outstanding and unpaid from time to time,
calculated on the basis of a 360-day year and actual days elapsed, at the rate
per annum indicated below.

         1. PAYMENT OF PRINCIPAL AND INTEREST. The principal balance of this
Note and accrued interest thereon shall be payable in full on demand by Lender.
Unless demand for payment is earlier made, accrued interest shall be payable
quarterly on the 1st day of the calendar month following the quarter in which it
accrues commencing on the 1st day of January, 1999, and continuing to be due on
the same day of each succeeding quarter thereafter until principal and interest
are paid in full. The provision of this interest payment schedule is not
intended, and shall not be construed, to affect or impair the demand nature of
this Note.

         2. INTEREST RATE. The unpaid principal balance of this Note shall bear
interest at a rate per annum of ten percent (10%).

         In no event shall the amount or rate of interest due and payable under
this Note exceed the maximum amount or rate of interest allowed by applicable
law (including, without limitation, O.C.G.A. ss. 7-4-18) and, in the event any
such excess payment is made by Borrower or received by Lender, such excess sum
shall be credited as a payment of principal (or if no principal shall remain
outstanding, shall be refunded to Borrower). It is the express intent hereof
that Borrower not pay and Lender not receive, directly or indirectly or in any
manner, interest in excess of that which may be lawfully paid under applicable
law. All interest (including all charges, fees or other amounts deemed to be
interest) which is paid or charged under this Note shall, to the maximum extent
permitted by applicable law, be amortized, allocated and spread on a pro rata
basis throughout the actual term of this Note and any extension or renewal
hereof.

         3. EVENT OF DEFAULT. During the existence of any Event of Default (as
defined herein), the unpaid principal balance of this Note shall bear interest
on each day until paid at the interest rate otherwise in effect under this Note
plus, in Lender's discretion, up to an additional five percentage points (5%).
All payments or prepayments on this Note shall first be applied to interest
accrued on this Note through the date of such payment or prepayment and then to
principal (with partial principal prepayments applied to installments in the
order of their maturity).

         The occurrence of any one or more of the following events will
constitute a default by Borrower hereunder (an "Event of Default"): (i) Borrower
fails to pay when due any amount payable under this Note; or (ii) if any
proceeding is instituted by or against Borrower alleging that Borrower is
insolvent, unable to pay Borrower's debts as they mature, or not generally
paying Borrower's debts as such debts become due, or if any proceeding is
instituted by or against Borrower under the Federal Bankruptcy Code or any
successor statute, or if any proceeding is

<PAGE>   2

instituted seeking the appointment of
a receiver or trustee for all or any portion of Borrower's property, or if any
proceeding affecting the rights or creditors generally is instituted by or
against Borrower.

         Upon the occurrence of an Event of Default, Lender, at its option,
without demand or notice of any kind, may declare this Note immediately due and
payable, whereupon all outstanding principal and accrued interest shall become
immediately due and payable; provided, however, that upon the occurrence of any
Event of Default described in clause (ii) above, this Note, without demand,
notice or declaration by Lender of any kind, shall automatically and immediately
become due and payable.

         4. PREPAYMENTS. Borrower may prepay the principal balance of this Note
in whole or in part without premium or penalty. All payments or prepayments on
this Note shall be applied, first, to interest accrued on this Note through the
date of such payment or prepayment and then to principal.

         5. ATTORNEY'S FEES. If this Note is collected by or through an
attorney-at-law, all costs of such collection incurred by the Lender, including
reasonable attorney's fees, shall be paid by Borrower.

         6. TIME IS OF THE ESSENCE; WAIVERS OF RIGHTS. Time is of the essence of
this Note. Lender shall not be deemed to waive any of its rights under this Note
unless such waiver be in writing and signed by Lender. No delay or omission by
Lender in exercising any of its rights under this Note shall operate as a waiver
of such rights, and a waiver in writing on one occasion shall not be construed
as a consent to or a waiver of any right or remedy on any future occasion.

         7. GEORGIA LAW GOVERNS. This Note shall be governed by and construed
and enforced in accordance with the laws of the State of Georgia (without giving
effect to its conflicts of law rules). Whenever possible, each provision of this
Note shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Note shall be prohibited by or
invalid under applicable law, such provision shall be ineffective only to the
extent of such prohibition or invalidity, without invalidating the remainder of
such provision or the remaining provisions of this Note.

         8. WORDS. Words importing the singular number hereunder shall include
the plural number and vice versa. The word "Lender" as used herein shall include
transferees, successors and assigns of Lender, and all rights of Lender
hereunder shall inure to the benefit of its transferees, successors and assigns.
All obligations of Borrower hereunder shall bind Borrower's successors and
assigns.

         EXECUTED by the undersigned Borrower as of the day and year first above
set forth.

                                   /s/ Waldemar Fernandez
                                  ----------------------------------------------
                                  WALDEMAR FERNANDEZ

                                  Address:
                                          --------------------------------------

                                          --------------------------------------

                                          --------------------------------------

                                      -2-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00010-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00010-of-00352.parquet"}]]