Note: NVIDIA Drivers Hack
Installing NVIDIA drivers in Lucid Beta 2
(Bug #552653 [Lucid] Jockey gives message that it failed to install nvidia hardware driver).
sudo gedit /etc/modprobe.d/blacklist.conf
Add these lines:
# NVIDIA Lucid beta2 vga16fb nouveau
Blacklisted as above.
I then installed recommended driver.
The wizard downloaded and installed then reported an error.
[Lucid] Jockey gives message that it failed to install nvidia hardware driver.
I rebooted and all is working.