The Callpod Dragon is a snug-fitting headset with a range of up to 100 meters.
Photo by: Callpod
If you like the idea of a Bluetooth headset but dislike having to wear one, the Cardo S640 might be a good compromise. You can clip the unit to your shirt, and then only wear the ear bud when there's a call. The ear bud tucks away neatly in the device when not in use.
Photo by: Cardo
The Iqua Sun is the world's first solar-powered Bluetooth headset. It has almost infinite standby time as long as you keep it constantly solar-charged.
Photo by: Iqua
The Etymotic etyBLU Bluetooth headset has amazing sound quality thanks to the in-canal ear buds, and the extended boom mic reduces ambient sound.