I can understand your trepidation about installing FC2 and them having to rebuild a new kernel (2.6.6). The last update from Nvidia was January (5336), so they are pretty due for a release.
I guess the only real way to get that information is to Email their support (???) or call them?
I would recommend that if you want to stick to the release kernels, you should wait to upgrde to FC2, until after appropriate drivers are released. Also try googling every few days of so for annoucements or check out http://linuxgames.com
( they usually find out pretty quick when there are press/stuff releases )