It measures only 3 inches by 0.9 inches by 0.5 inches, but Kingston Technology's DataTraveler 150 USB flash drive offers the largest capacity in the line: 32GB. Forget carrying a few dozen MP3s, a couple photos, and some Word docs. That kind of storage puts a digital media collection in your pocket.
The DataTraveler 150 is available now in the U.S. only at an MSRP of $139. It's of course fully compatible with Windows Vista, XP and Windows 2000 as well as Mac OS X 10.3 (and above), and Linux 2.6 (and above). It also carries a five-year warranty and includes 24/7 tech support in case you can't figure out how to put it in your USB port, I guess.