LG has recently announced the LG HBM-810, which is a Bluetooth headset housed inside a solar-powered charging cradle. The headset itself is designed to be lightweight and features dual microphones, noise reduction, echo cancellation, and up to 5 hours of talk time and 150 hours of standby time. It also has multipoint connectivity so it can connect up to two devices at the same time. Other features include voice dialing, caller ID announce, and A2DP support.
It's currently for sale at T-Mobile stores for $99.99 retail.