http://www.indieroyale.com/
They regularly release pay-what-you-want bundles of indie games. You get direct-downloads and Steam and Desura keys.
The current bundle includes Scoregasm. Which has a Linux version. For which you get (as mentioned) both a direct download of the Linux version, and a key that you can use with the Linux version of Desura.
So what are you waiting for? Go support them!
You have four days until the promotion ends.