I've been on the hunt for quite a while, and managed to get one of those .99 cent jobs from Japan. (last year, pre-disaster) It's this one: Taking a shot in the dark, and figuring it wouldn't work with a Mac, guess what? No dice. I actually tried it on an XP PC and there was some sort of error. My iMac didn't even recognize it, and seemed to care less if it was even plugged in or not. I tried a reboot, and shockingly, my iMac wouldn't get past the grey screen and boot to the desktop when it was plugged in. I told the seller, and he sent a second one (free, nice guy), but it had the same results across the board. Oh well, $1 for 2 dead USB things, one less cheeseburger I didn't need. (I didn't try it under Vista or 7 though - maybe it does actually work.) Wondering if anyone has had success with a really cheap USB Bluetooth adapter for PPC Macs? Namely, the iMac G4.