Cash on the forums?

bbpressphpBB has a cash mod, but the base system is bloated like Opera web browser.  bbPress is better for a base forum system, as it’s faster within reason.  The only problem is that there are only half the modifications you could ask for available.  (Most of the features of phpBB are plugins for bbPress.)  What I’m going to try to do is make a cash mod plugin for bbPress.  Do you think I can do it?  What features will I need to include? [tags]bbPress, Programming, Plugins[/tags]