In my haste to get my hands on Lucid, I installed it and skimmed through the docs. But I could never get it to work. As it turns out, I had not read the documentation well. The docs link to a page for supported video cards; in my haste, I thought that any video card linked from the video card comparison chart were compatible. However, the page linked must be compared with the compute capability version (just like the docs say...).

So that others who are as impatient as me might also read this: It looks like you need at least a 600+ series for Geforce.

Unfortunately for me, my 480 doesn't make the cut. Now we'll see how long I can resist the urge to update the video card.... :)