It is a final, and luckily enough works well here (260 MB of bugfixing patches already downloaded and installed!). Of course I do NOT use the Nvidia rubbish, but rather the xfree 4.3 NV ones, which simply work great.
There will be another, more stable 10.0 release, labelled as "Official" somewhere around May- you should consider the Community releases as a Cooker successor.
If you want stability instead, try Slackware 9.1, which is surely enough the cleanest distro out there, as well as the most difficult to install.
Personally, I toy a lot with software and so I can only use either Mandrake/urpmi or Debian/apt-get, else I would have to check for dependencies most of my time!
Finally, if kernel 2.6.X doesn't work well then you will find a copy of kernel 2.4.25 on CD2.