I was briefly thinking of doing a Pokémon (R/B) hack now when I have developed a tool for GB stuff. The original sprites were a bit quirky, but they actually kind of fixed them in later versions, and there are tons of hacks for Pokémon already, so I just dropped the thought.
I think the Commercial Critiques(/praise) are interesting and they're probably easy to post and manage for the organizer as well (s/he can just post a title and some links to screenshots periodically).
A larger community project has awkward quality control authority problems and has to face eventually failing/awol components. Otherwise, I think it would be fun to do a community game project since graphical tasks can often be parallized and eventually synchronized (moreso than programming stuff at least).