I've been using the bodybugg food logging program through my gym for 7 weeks now. It's really great and I've lost 13 lbs! I was dying to get the armband and just broke down and bought it.
www.24hourfitness.com has it on sale right now for $270, they usually retail at $399. I found a coupon code for an additional $50 off, so I got it for $220!
It's so amazing to see exactly (with 92%) accuracy what I burn doing what. Is anyone else using the bodybugg? I wish there was a group on here for it.