EXHIBIT
      10.4

    


    AMENDMENT
      TO CERTAIN SENIOR CONVERTIBLE NOTES ISSUED BY

    SINGLE
      TOUCH SYSTEMS INC. (FKA HOSTING SITE NETWORK, INC.)

    TO
      THE UNDERSIGNED HOLDERS

    


    


    This
      Amendment is made and entered into as of the 15th
      day of
      June 2008. Unless otherwise defined herein, capitalized terms used in this
      Addendum shall have the meaning given to them in the Senior Convertible
      Notes.

    


    WHEREAS,
      each Holder is the purchaser of a senior convertible note (the “Note”) of Single
      Touch Systems Inc. (formerly known as Hosting Site Network, Inc.) (the
“Company”) dated between March 17, 2008 and March 31, 2008; and

    


    WHEREAS,
      each Note provides for the accrual of interest thereon commencing 90 days
      following the Issuance Date (the “Interest Accrual Date”); and

    


    WHEREAS,
      each Holder has agreed to extend the Interest Accrual Date to July 31,
      2008.

    


    NOW,
      THEREFORE, in consideration of the respective covenants contained herein and
      intending to be legally bound hereby, the parties hereto agree as
      follows:

    


    1. Section
      2(a) of the Notes is amended to read as follows:

    


    “(a) Interest
      on any outstanding Principal payable pursuant to this Note shall commence
      accruing July 31, 2008 (the “Interest
      Accrual Date”)
      and
      shall be computed on the basis of a 360-day year and actual days elapsed and
      shall be payable in arrears for each Calendar Quarter beginning on the Interest
      Accrual Date and ending on, and including, the Maturity Date (each, an
“Interest
      Date”)
      with
      the first Interest Date being October 1, 2008. Interest shall be payable on
      each
      Interest Date, to the record holder of this Note on the applicable Interest
      Date”.
      

    


    2. All
      other
      terms of the Notes, as previously amended by the Addendum thereto dated as
      of
      June 10, 2008, shall continue with full force and effect.

    


    3. This
      Amendment may be executed in any number of counterparts, each of which shall
      be
      deemed to be an original, but all of which taken together shall constitute
      one
      and the same agreement.

    


    
      
         

      

      
         

        
          

        

      

      
         

      

    


    IN
      WITNESS WHEREOF, this Amendment has been executed by the parties as of the
      date
      first above written:

    


    
      	
              HOLDER:

            	 	
              HOLDER:

            
	
              (Individual)

            	 	
              (Entity)

            
	 	 	
              Hemisphere
                Trading Corp. 

            
	 	 	
              (Name
                of Entity)

            
	 	 	 
	
              /s/
                James Cassina  

            	 	
              By: /s/
                Robert Cordes  

            
	
              Name:
                James Cassina

            	 	
              Name:
                Robert Cordes

            
	 	 	
              Title:
                President

            
	 	 	 
	
              HOLDER:

            	 	
              HOLDER:

            
	
              (Individual)

            	 	
              (Entity)

            
	 	 	
              Galaxy
                Dragon Limited  

            
	 	 	
              (Name
                of Entity)

            
	 	 	 
	 	 	
              By: /s/
                Erwin Sui   

            
	
              Name:

            	 	
              Name:
                Erwin Sui

            
	 	 	
              Title:
                Attorney-in-Fact

            
	 	 	 
	
              HOLDER:

            	 	
              HOLDER:

            
	
              (Individual)

            	 	
              (Entity)

            
	 	 	
              Fieldston
                Traders Limited

            
	 	 	
              (Name
                of Entity)

            
	 	 	 
	 	 	
              By: /s/
                Erwin Sui   

            
	
              Name:

            	 	
              Name:
                Erwin Sui

            
	 	 	
              Title:
                Attorney-in-Fact

            
	 	 	 
	
              HOLDER:

            	 	
              HOLDER:

            
	
              (Individual)

            	 	
              (Entity)

            
	 	 	
              Belesarius
                Industries Inc.

            
	 	 	
              (Name
                of Entity)

            
	 	 	 
	 	 	
              By: /s/
                Lynn Turnquest  

            
	
              Name:

            	 	
              Name:
                Lynn Turnquest

            
	 	 	
              Title:
                President

            
	 	 	 
	
              HOLDER:

            	 	
              HOLDER:

            
	
              (Individual)

            	 	
              (Entity)

            
	 	 	
              Lion
                City Capital

            
	 	 	
              (Name
                of Entity)

            
	 	 	 
	 	 	
              By: /s/
                Sylvia Seymour  

            
	
              Name:

            	 	
              Name:
                Sylvia Seymour

            
	 	 	
              Title:
                President

            
	 	 	 
	
              SINGLE
                TOUCH SYSTEMS INC.

              (FKA
                HOSTING SITE NETWORK, INC.).

            	 
	 	 	 
	
              By: /s/
                Scott Vicari   

            	 	 
	
              Name: Scott
                Vicari

            	 	 
	
              Title: President