Shegokigo said:
http://www.amazon.com/Inland-87076-Powered-Vibration-Headset/dp/B000234N0S/ref=sr_1_2?ie=UTF8&s=electronics&qid=1246938525&sr=1-2
These seem to be getting some decent reviews.
Note that the USB plug is only to power the vibration - you still have to plug it into a regular headphone/microphone jack, or get a USB adaptor.
-Adam