I got an email from William C. who asks "Is there such a thing as a hand-held bluetooth remote control (like theinfra-red one for the RCX) that I can use with the NXT? My cell phone isn't bluetooth enabled, and I don't want to have to buy another NXT just to get the benefits of remote control."
Bluetooth confuses me, too, William. Mainly because I've never been able to get it working on my PDA (incompatible Bluetooth version). I've got a new laptop coming in a few weeks that has built-in bluetooth so I'm hoping to learn some more there.
I've got 2 NXT Bricks and have had some limited playtime with using them together, but again, I'm not an expert. If you've got some comments for William (or me) regarding bluetooth options, please share your comments with us.