At UUC we are interested in playing the best examples of XNA community games and making our own. We have good a community of students who are developing XNA games and we have seen some quite exciting work over the last year (I must put some links to samples later). A game that we are looking forward to is “Shellshock Skirmish” by Richard Paul – it just went through its first playtest on creators.xna.com and is now getting a control update and AI opponents. It’s a Worms-like game that seems to have better gameplay than the recently released XBLA game “Death Tank”.
Nicktheduderino does a regular podcast reviewing the latest games on XBox Community and his latest one is just out – very useful in deciding which games to try out. The XNA Team Blog covers a few other websites that focus on XNA Community games.