official steam release for linux
Saw it on slashdot last night, looks like lots of games are already ported...
From what I can tell from the installer, it is really meant for Ubuntu 12.x 32bit systems, but I've read reports of folks using it on 64bit systems...
Personally, if you can afford it, I think "we" (Linux users) should buy what we can, show that there is a market for our platform. I did it with Loki games and their original ports, and I'll be buying a few games this weekend on steam - assuming I can get it to install on a Mint 64bit system.
This space for rent