This Slashdot post has a a nice roundup of novelty USB-powered devices:
- USB
electric blanket [mib.co.jp] - USB coffee heater [dct-net.co.jp]
- USB toothbrush [impress.co.jp]
- USB fan [tt-hardware.com]
- omg wtf is this! [dreamkitty.com]
- USB ‘Desktop safety fan’ (?) [skysis.com.tw]
- USB light [gamestech.com]
- USB fingerprint reader [eyenetwatch.com]
- USB police strobe [impress.co.jp]
- George Foreman USB iGrill (knock out da USB fat!) [thinkgeek.com]
- USB electric razor [impress.co.jp]
- USB noodle strainer [impress.co.jp]
(Thanks, Dan!)