Get ready for a trend!
Steam: nutinmuch -- I own a bunch of valve games but I primarily play CS:S. I spend most of my time scrimming with my team so I rarely pub. Every now and then I'll go run one though.
XBL: nutinmuch -- I rarely am on XBL. Mostly for Forza 3 if I am though.
WoW: Yeah yeah yeah. I'm on Maelstrom, though these days I only log on to raid (waiting on Cataclysm~).
And to the CS conversation on the previous page: Buy deag, aim for heads, profit.
All my clips were on vimeo before it turned against any sort of game clip so I have nothing to show off, but this is pretty awesome so here:
YouTube - CS:S - Incorporated 2 by ClaYmaN - HD w/ Sound