I am using a PNY Attache 4 GB version.
Don't freak out if it does not work the first time you plug it in. Many
people, with diferent drives have had to plug and unplug them a few times. I
often have to go to properties and have it optimize for speed. I have also
found that a reformat sometimes kicks it into butt.
You also have to make sure you have not disabled its service, which is
called something like USB hard drive support...This service was suggested as
being disabled in one of the online Vista tips guides.