Well, not actually my mom...

Lest we forget the really important date next month (yes, the availability of the Halo 3 beta is cool, but) which is Mother's Day, the XBOX team has a contest running called My Mom's a Gamer. See the site for details, but basically you write an essay about your mom and gaming, and you have a chance to win flowers for her, and an XBOX 360 Elite for you (or your mom, if she regularly pwns you in GoW).

Alas, unlike the Halo 3 beta, Microsoft employees aren't eligible, so I'll have to figure out some other way to get me a 360 Elite.