Does anyone have one of these or know anything about them?  I think this is what I'm going to ask for for my birthday.  I read several reviews on amazon and it says it really motivates people to burn calories. 

Bodybugg is the arm one they wear on the  Biggest Loser, and the GoWear is the same thing, but cheaper, and per the reviews, made by the same company. I'm really interested in this.

I've got one and I'm addicted to it. I had the original Body Bugg and then upgraded to the new smaller black one. I got mine through 24hr fitness/ Apex Fitness.  Keep in mind that you do need to pay a fee to use the online portion of the program (calorie intake, etc.) The Bugg is nearly worthless without that part.