Didja get Doom from XBL Arcade?
If you do, hollar. I’m itchin’ for sum deathmatch and possibly coop Doomin’.
There’s probably better deathmatching to be had on XBL, but the coop is top tier.
^ Yeah, I’m finding that I’m winning most of my matches… and that ain’t right. 
Perhaps I should be a little more open-minded towards coop…
WTF! Doom on xb360 arc? This really makes me REALLY want to get a 360!
To boot, it is probably the best non-PC version of Doom. Smooth, fast, pretty, and works very well with the XB360 controller. All four episodes of Ultimate DOOM are here.
Admittedly, though, since digging up my old PC ult. DOOM and DOOM2 and running them through ZDOOM, I haven’t played XBL DOOM much. Custom levels are the hotness.