Refract Studios, the guys behind Distance, an arcade survival racing game with a Tron-like feel has just added Linux support to its Greenlight profile.http://steamcommunity.com/sharedfiles/filedetails/?id=103111305
They're also running a Kickstarter campaign
at the moment, which was updated with this earlier today:
"We’re excited to announce that Distance will officially be supported on Linux! We tested Distance using the Unity 4 beta, and we feel confident that we can safely bring Distance to Linux. You can read more about the Unity 4 Linux support by checking out their FAQ page here. For those of you who are Linux users, please help by reaching out to the Linux community and let them know that this game exists!
I really hope this ends up being successful. I've been hoping for a Linux version since Nitronic Rush was released :D