http://blogs.valvesoftware.com/linux/steamd-penguins/
After successfully porting L4D2 to Ubuntu, interest grew within Valve and, as a result, the team and projects we were working on also grew. Currently, our focus is on the following projects:[ul][li]getting the Steam client onto Linux with full functionality[/li]
[li]optimizing a version of L4D2 running at a high frame rate with OpenGL[/li]
[li]porting additional Valve titles[/li][/ul]Current Projects
The goal of the Steam client project is a fully-featured Steam client running on Ubuntu 12.04. We’ve made good progress this year and now have the Steam client running on Ubuntu with all major features available. We’re still giving attention and effort to minor features but it’s a good experience at the moment. In the near future, we will be setting up an internal beta focusing on the auto-update experience and compatibility testing.
