Apple has released (available through Software Update) a new version of their Bluetooth drivers for the Macintosh. Bluetooth Update 1.5 (available for Panther users) will allow you to use a Bluetooth headset for your iChat connections and other sound I/O. Further, if you are near a Bluetooth printer, just select Bluetooth Printers from the Printer menu and you can scan for the printers, select them, and just print.