I was thinking, it would be a great feature to have with your simplepress forum (one you could even charge a one time fee for) to allow the user to integrate adsense ads into their forum at whichever location they choose)  For example, this link below shows optimal google adsense placement for forums:

http://www.google.com/images/adsense/en_us/support/forum_en.jpg

Integrating this strategy into your forum set will not only skyrocket your forums popularity (because people can monetize their own forum) but it ads a profit generating feature to the forum which most definitely makes it worth purchasing (I would definitely consider it myself)