Sorry to let you down but there is no mention anywhere about this game using OpenGL. Being that its built with the UT3 Engine I doubt they have an OpenGL client.
UT3, in and of itself, doesn't preclude an OpenGL client. They HAVE one for Unreal Tech 3- it's just that nobody has released a Linux version thereof yet.
Having said this, it's a lower likelihood- and unless you can chip in a good chunk to salvage the title, you're not going to have enough pull to ensure a Linux client will get released. It's more because you have to be able to salvage the publishing deal than it being UT3 based.
@Setlec, UT 3 was not a disappointment for me, actually for me it's very very awesome, just as the first UT was. And I highly doubt the UE 3 is not good, as much as I dislike some practices of Epic and some of them, particularily CliffyB. And then there's Wiederhold's chair story. And Gordon's delay with the Linux port.