There's no written rule really, but usually if a kernel proves stable enough it will be backported to the Fedora N-1 release. So for example I doubt that F11 will see 2.6.32, but it's very possible that Fedora 12 will even if it doesn't make it's way into the stable repo. You should be able to find some F12 2.6.32 updates soon on Koji or Bodhi (updates-testing).
Edit: Actually, there are some up now:
Most recent one built yesterday morning