So um... Bluetooth

What do I do with Bluetooth? I've never had a device that used it before. I know how to deal with WiFi, and I'll surely use that whenever I'm at Panera, but what is this Bluetooth thing really useful for?

I'm learning that my PDA does all kinds of neat tricks - I bet I'll even be able to download TiVo shows to it eventually.

Oh, and I also saw that my PDA can use IR, Bluetooth, or Serial to dial a GSM phone. DING DING DING! Now I won't have to store numbers in multiple places, yay.

LOST

I'm starting to think they design this show for TiVo. I keep having to rewind it and rewatch stuff...