In this thread, we post our Xbox Live Gamertags.
I did do a search and found nothing on this. I'm surprised on the lack of topics on the 360 here. It's actually a quality console.
Anyway, here's my Gamertag.
Add me. I only have a month since I just got my 360 as well as Live and the only game I have is Aegis Wing (but I can get Pinatas in Viva Pinata).