I would wait.

Ubuntu is switching to Plymouth with Lucid Lynx and Plymouth does not work
with Nvidia proprietary drivers, or at least not without lots of grief. My
Fedora 12 does not have compositing due to the Nvidia/ Plymouth problem and
my Lucid Lynx does not get any graphical because I tried to install Nvidia
proprietary drivers form their own repositories.

I love my Nvidia card, but am thinking of getting an ATI if Canonical does
not get it right. So far they have not.