I've never been involved either in game development or frequent gaming, but being an Xbox360 owner in the last 6 months, I've been paying more attention to the field.
Last night, local Microsoft organized an XNA Game Night, where 6 teams showed off some of their game dev skills. Most of the games were simple (with 2 exceptions), some of the PC and some for the Xbox360 (none for the Zune!), most of them Arcade-like games, but it was apparent that XNA is a very interesting platform for game development, and it's very easy to get caught up and seduced by ideas and start thinking about giving it a try. Guess what I'm downloading... :-)
Anyway, if anyone is interested, some starting points are the following: