LG HBS-250 Bluetooth Stereo Headset

Pros: Audio quality is GREAT. Worked great with my iPhone when I had one, works great now with my Droid X and MBP. Battery life is phenomenal: both the iPhone and Droid die long before it does. Comfortable and unobtrusive on my ears, while still secure.

Cons: Couldn't control iPhone playback from it and Droid X doesn't send tones through it (phone end issues, I think). Giant external button gets pressed easily and can produce annoying results: redialed people a lot on iPhone. Can't use while charging.

Summary: Nice piece of hardware overall. Got it for $25 on Woot. It was ABSOLUTELY worth that much. Doesn't have issues with losing connection to the phone when my body is between them like a lot of other sets seem to.
Overall, it's not the best headset I've ever seen, but it's the best I've actually purchased.