This might sound stupid, but maybe there should be a new tab listing homebrew titles. I mean aside from downloading "real" games, most people use flash carts for all the great homebrew out there. My personal favorite being Video Games Hero. Think of all the possibilities ;D
The homebrew world is far too vast and dynamic. Every day sees many updates to many different projects; keeping up-to-date while effectively cataloging these projects is a very difficult task, even for websites largely dedicated to homebrew such as GBATemp and DCEmu.
