It is about ******* time they officially announced this. If they can get L4D2 running, they should be able to get all their games running on the Source engine running. And now that they are supporting Linux in an official manner, there is a higher likely hood that their future engines and project will be supported under Linux/Ubuntu.
Once one Source Engine game is ported others will follow and be quicker as well since the underlying technology will already be there so we should see other source engine games in a short time after.
Just FYI my website www.gamingonlinux.com is a place i did post confirmation on Steam For Linux coming multiple times, it's not just phoronix who is in the know ;)
Glorious news indeed, Steam support would be one of the biggest advances in making Linux viable for home use.
You have to think - they must be quite far along if they are officially announcing it and blogging it now, maybe a beta around the corner?
finally, just wonder when it will be released
Last word was to the end of 2012...
This is possibly an exciting time for Linux. This is a good sign that PC software makers are becoming uncomfortable with how Microsoft seems to be shifting toward forsaking the desktop/laptop. Windows 8 does a lot for tablets and the touch screen, but in my opinion since trying it out in a VM, the disadvantages it brings to the desktop outweigh the advantages.
If that is the future that Microsoft is choosing to head toward, I can understand why PC software creators would start thinking toward supporting Linux, too.