maybe thats why publishers dont allow their games to run on linux.
I do imagine that is part of the concern. Could you imagine the opensource community screaming over a binary copy-protection blob on their systems? Although there are commercial applications out there that do incorporate some sort of copyprotection ie Maya
Don't think so...
I'd imagine that the Linux binaries were ready long, long ago.
The problem -seems- to be legal and/or licensing related, and as such, the fact that such binaries do exists means nothing.
I've abandoned all hope of having UT3/Linux long, long, long ago. (Though I'd love to be proven wrong)