Wait for Red Tooth
What kind of things do you suppose they'll do with bluetooth? Answer your not-iphone, connect to keyboard, wireless headphones, sync with your computer (do Macs use bluetooth?)?
Bluetooth = cool
Macs do use bluetooth -- it's how I send pictures from my phone to my computer (thankfully Sprint does not lock that feature like Verizon and AT&T). I should be able to use it to sync my calendars. Also, when I (eventually) get a Sync-enabled car, I'll be able to play music wirelessly -- no plugging/unplugging :)