I just heard from the XNA team that they've had an amazing response to the XNA Community games for download on LIVE.  Lots of people at GDC have commented that they won't be back home before the games are no longer available, so the team extended the download deadline by 48 hours.

If you haven't already downloaded these games from Xbox LIVE, you have until Tuesday, Feb 26th Midnight PST to download them.  You can play them until March 9th, midnight PST.

Whacha waiting for? 

[Edit: Clarification for everyone: These games are just a taste of what's to come this fall.  Consider this kind of a limited-time "beta" of the real service.  The games will essentially "expire" on March 9, and you won't be able to play them.]