Now I can't think of a single reason that I'd want to use my precious time to send photos from the camcorder
Glad I'm not the only one who wondered why Sony Camcorders have bluetooth. I couldn't find a single reason I would ever need it.
As far as the external Bluetooth module, looks like it should be seen as a modem to any Bluetooth capable PC, PDA or other similar device. Might be nice if you ever travel with a laptop, and don't want a phone line running to your laptop in the hotel room.
So far, the only place I have seen useful bluetooth has been on my T68i and Mac. I plan on getting a bluetooth car kit for the phone, and the Bluetooth integration into OS X is actually useful. If my T68i is in range, I can sync my calendar, address book, and put pictures on the phone. Also, if the phone rings, Address Book can pop up a window with the caller ID, and 3 choices, Answer, Bounce to Voicemail, or Send SMS Reply.