I bought this dongle from Hong Kong, and to date it's not working as expected, not even in XP (didn't try Vista though)
so far only worked under Ubuntu 8.10
Leopard detected my dongle and showed the information below:
Apple Bluetooth Software Version: 2.1.3f8
Hardware Settings:
Centaur:
Address: 00-1f-81-00-02-00
Manufacturer: Unknown
Firmware Version: 3.3 (3.3)
Bluetooth Power: On
Discoverable: Yes
HCI Version: 3 ($3)
HCI Revision: 3 ($3)
LMP Version: 3 ($3)
LMP Subversion: 3 ($3)
Device Type (Major): Computer
Device Type (Complete): Macintosh Desktop
Composite Class Of Device: 3670276 ($380104)
Device Class (Major): 1 ($1)
Device Class (Minor): 1 ($1)
Service Class: 448 ($1c0)
Requires Authentication: No
Services:
Bluetooth File Transfer:
Folder other devices can browse: ~/Public
Requires Authentication: Yes
State: Enabled
Bluetooth File Exchange:
Folder for accepted items: ~/Downloads
Requires Authentication: No
When other items are accepted: Ask
When PIM items are accepted: Ask
When receiving items: Prompt for each file
State: Enabled
Incoming Serial Ports:
Serial Port 1:
Name: Bluetooth-PDA-Sync
RFCOMM Channel: 3
Requires Authentication: No
Outgoing Serial Ports:
Serial Port 1:
Address:
Name: Bluetooth-Modem
RFCOMM Channel: 0
Requires Authentication: No
However I don't have luck pairing any devices at all!