So, I bought a bluetooth dongle (D-link DBT120) from the Apple Store a little over a month ago. This morning, boom, nothing. Checked the usb port, works fine, but the dongle is dead. I took it back to the Apple Store across the street from my office and explained the situation. The guy said, unfortunately since it was over a month ago I would have to go through D-Link tech support. He checked the dongle to make sure it was indeed not working. Then he paused, turned around and grabed one off the shelf and exchanged it for me! Couldn't be happier! Just thought I'd share. By the way, my Powerbook has bluetooth built in, so sometimes I use it on my iMac 17" 800mhz to sync my phone, but mostly the dongle is plugged into my stupid Dell laptop at the office so I can use my Apple Wireless keyboard!