<PAGE>   1
                                                                   EXHIBIT 10.30


                                 REVOLVING NOTE

$3,000,000                                              Dated as of July 7, 1999

         FOR VALUE RECEIVED, DIEDRICH COFFEE, INC. and all of its direct and
indirect Subsidiaries (collectively, the "Borrowers"), hereby jointly and
severally promise to pay to the order of BankBoston, N.A. (hereinafter, together
with its successors and assigns, called the "Lender"), at the office of the
Lender pursuant to the Credit Agreement (as amended or extended from time to
time, the "Credit Agreement"), dated as of June 30, 1999, among the Borrowers
and the Lender, the principal sum of $3,000,000 or, if less, the aggregate
unpaid principal amount of Revolving Loans advanced by the Lender to any of the
Borrowers pursuant to the Credit Agreement, together with interest on the
principal balance thereof from time to time outstanding from the date hereof
until payment in full, without set-off, deduction or counterclaim, on the dates
and in such amounts as specified in the Credit Agreement, and at the final
maturity of this Note, whether by payment or prepayment, acceleration or
otherwise. Interest accruing on the unpaid balance hereof from time to time
shall be calculated on the basis of a 360-day year for the actual number of days
elapsed.

         Overdue principal (whether at maturity, by reason of acceleration or
otherwise) and, to the extent permitted by applicable law, overdue interest and
fees or any other amounts payable under the Credit Agreement due to the
Borrowers' failure to pay the same in full shall bear interest from and
including the due date thereof until paid, at a rate or rates per annum
determined in accordance with the Credit Agreement, which interest shall be
compounded daily and payable on demand.

         All payments under this Note shall be made to the Lender, at the head
office of the Lender, at 100 Federal Street, Boston, Massachusetts 02110 (or at
such other place as the Lender may designate from time to time in writing) in
lawful money of the United States of America in immediately available funds.

         The outstanding principal amount of this Note and accrued and unpaid
interest thereon shall be due and payable as provided in the Credit Agreement.
The Borrowers have the right in certain circumstances and the obligation in
certain other circumstances to prepay this Note in whole or in part on the terms
and conditions provided in the Credit Agreement.

         This Note is the "Revolving Note" referred to in the Credit Agreement
and evidences Revolving Loans thereunder. This Note is entitled to the benefits
of the Credit Agreement (including the Schedules thereto) and all other
instruments evidencing and/or securing the indebtedness hereunder; but neither
this reference to the Credit Agreement nor any provision thereof shall affect or
impair the absolute and unconditional obligation of the Borrowers to pay the
principal of and interest on this Note as herein provided. The occurrence or
existence of an "Event of Default" as defined in the Credit Agreement shall
constitute a default under this Note and the entire indebtedness hereunder may
become or be declared due and payable as may be provided for in the Credit
Agreement.

         The Lender shall, and is hereby irrevocably authorized by the Borrowers
to, endorse on the schedule attached to this Note or a continuation of such
schedule attached hereto and made a part hereof, an appropriate notation
evidencing advances and repayments of principal of this Note, provided that
failure by the Lender to make any such notations shall not affect any of the
Borrowers' obligations or the validity of any repayments made by any of the
Borrowers in respect of this Note.

         All agreements involving the Borrowers and the Lender are hereby
expressly limited so that in no contingency or event whatsoever shall the amount
paid or agreed to be paid to the Lender for the use or forbearance of the
indebtedness evidenced hereby exceed the maximum amount which the


<PAGE>   2
Lender is permitted to receive under applicable law. If, from any circumstances
whatsoever, fulfillment of any provision hereof or of the Credit Agreement, at
the time performance of such provision shall be due, shall involve exceeding
such amount, then the obligation to be fulfilled shall automatically be reduced
to the limit of such validity, and if from any circumstance the Lender should
ever receive as interest an amount which would exceed such maximum amount, such
amount which would be excessive interest shall be applied to the reduction of
the principal balance evidenced hereby and not to the payment of interest. As
used herein, the term "applicable law" shall mean the law in effect as of the
date hereof; provided, however, that in the event there is a change in the law
which results in a higher permissible rate of interest, then this Note shall be
governed by such new law as of its effective date. This provision shall control
every provision of all agreements involving the Borrower and the Lender.

         Each of the Borrowers and every endorser and guarantor of this Note or
the obligation represented hereby waives presentment, demand, notice, notice of
dishonor, protest and all other demands and notices in connection with the
delivery, acceptance, performance, default or enforcement of this Note, assent
to any extension or postponement of the time of payment or any other indulgence,
to any substitution, exchange or release of collateral and to the addition or
release of any other party or person primarily or secondarily liable.

         This instrument shall have the effect of an instrument executed under
seal and shall be governed by and construed in accordance with the laws of the
Commonwealth of Massachusetts (without giving effect to any conflicts of laws
provisions contained therein).

         IN WITNESS WHEREOF, the undersigned has caused this Note to be signed
in its corporate name under seal by its duly authorized officer as of the day
and year first above written.


                                         DIEDRICH COFFEE, INC.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


                                         COFFEE PEOPLE, INC.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


                                         COFFEE PEOPLE WORLDWIDE, INC.


                                         By:  /s/ Ann Wride
                                             -----------------------------------




                             (SIGNATURES CONTINUED)


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<PAGE>   3
                                         GLORIA JEAN'S, INC.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


                                         EDGLO ENTERPRISES, INC.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


                                         GLORIA JEAN'S GOURMET COFFEES CORP.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


                                         GLORIA JEAN'S GOURMET COFFEES
                                         FRANCHISING CORP.


                                         By:  /s/ Ann Wride
                                             -----------------------------------


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<PAGE>   4

<TABLE>
<CAPTION>

                             AMOUNT OF
            AMOUNT OF        PRINCIPAL       BALANCE OF
            REVOLVING         PAID OR        PRINCIPAL           NOTATION
DATE          LOAN            PREPAID          UNPAI             MADE BY
----        ---------        ---------       ----------          --------
<S>         <C>              <C>             <C>                 <C>


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