There is a patch that has been floating around to make it run with SOME 2.5 kernels... you'll have to do some searching around to find more on it.
I wish i could help you more.
But as far as development of support for the 2.5 kernel, Does nvidia realease drivers for the newest mac os while its still in beta??? hell no!!! But with the linux driver you get a part of the source so it can be modified to compile for other kernels
So yes, it MAY work for the 2.5 kernel your running, but nvidia isn't about to start shooting at a moving target to support it