i spent the last few weeks in a place without internet (yeah, it was hell), but i had my xbox360 with me. i played a few new games (and a few old ones) and when i connected my 360 to the internet so it could give the live servers its stats, look at the surprise xbox.com gave me (pics a little bit big, but if i resized it would have made the words illegible)
look at the redbox i put in there to draw attention to those games. it says they where last played in 2002! while you guys where all enjoying your new xbox's i was apparently enjoying a 360 and some post launch games
also, my games that where played previously where bumped to the top of my games played list, but the old date was kept.
like i said, not a major glitch, but i thought it was pretty cool and worth mentioning
---edit---
you can also see it in my live profile right now too. it will probably stay that way until i play those games again
http://live.xbox.com/member/Reaper527