Bluetooth is a short range wireless network (30-foot radius) where pairs of devices negotiate to communicate with one another. I now own a Nextel 7520 BlackBerry (bluetooth disabled for the moment) and was contemplating the availability of a Bluetooth hands-free kit for my car.
Any new technology goes through growing pains before it gets stable.
I now own a Nextel 7520 BlackBerry...My condolences. Whatever you do, DO NOT accept any auto-updates, because it will wipe your address and phone books clean, and erase your emails.