As long as my ATI drivers on my main pc, get better im all for it. Because Borderlands 2 on linux is a stuttering mess, compared to my other PC with a Nvidia card.
Yeah thanks to patent trolls a lot of stuff is locked up tight. Lawyers would have Nvidias and Ati's balls in a fire, if they released code that they had licenced for free into the Linux community.
So that explains why it probably not open sourced, plus the code probably has hidden secrets on how their chips work and they don't want the competition getting an edge.