Possible to upgrade video card on Pangolin P7?

I've had my PanP7 for a while now, and I'm getting a little tired of the ATI video card that it came with. It is a little problematic for certain games, so I was wondering if it is possible to upgrade to some sort of newer NVidia graphics card? I currently have Ubuntu 10.10 x64 installed (if that makes a difference).

Thanks!

@naikvarda: I don't quite understand your comment. My post is more of a question than an informative answer.

Can anyone from System 76 give me a definite answer?

Unfortunately, the video card in the Pangolin is soldered onto the motherboard, and can't be replaced.