Newton Peripherals, makers of those sweet MoGo mice that fit inside your PC card slots, have now come out with the tiniest of tiny bluetooth adapters. The idea here is that it's so small and smooth that you can just leave it plugged into your computer all the time. And if my three and a half year old laptop didn't have bluetooth, I'd be all over this lil' guy. Look for them around June for $49.
MoGo Dapter - finger nail sized Bluetoth adapter [Red Ferret]