Hi, the card I have success with, is HP Atheros AR5B195 WiFi + Bluetooth card from eBay.
I use Bluetooth generally for wireless keyboard and mouse and I use it to connect to internet via phone when the Sky internet is down.
I haven't used it with Apple magic mouse and haven't tried gestures.
This is info from Win XP Unknown devices app:
USB Device
Unable to Detect, Hardware ID: Vid_0cf3&Pid_3005
If you Google for '0cf3 3005 osx86' the second result will be drivers.
This is info from Mac 10.8 System Properties which appears there only after installation of drivers:
Apple Bluetooth Software Version: 4.1.4f2 12041
Hardware Settings:
Address: D0-DF-9A-FC-E5-7F
Manufacturer: Unknown
Name: Bluetooth Mac (d0-df-9a-fc-e5-7f)
Firmware Version: 5.39321 (5.39321)
Bluetooth Power: On
Discoverable: Off
Vendor ID: 0xcf3
Product ID: 0x3005
HCI Version: 5 (0x5)
HCI Revision: 39321 (0x9999)
LMP Version: 5 (0x5)
LMP Subversion: 39321 (0x9999)
Device Type (Major): Computer
Device Type (Complete): Mac Desktop
Composite Class Of Device: 3801348 (0x3a0104)
Device Class (Major): 1 (0x1)
Device Class (Minor): 1 (0x1)
Service Class: 464 (0x1d0)
Services:
Bluetooth File Transfer:
Folder other devices can browse: ~/Public
State: Enabled
Bluetooth File Exchange:
Folder for accepted items: ~/Downloads
When other items are accepted: Ask
When receiving items: Prompt for each file
State: Enabled
Incoming Serial Ports:
Bluetooth-PDA-Sync:
RFCOMM Channel: 3
Requires Authentication: No
Outgoing Serial Ports:
Bluetooth-Modem:
Address:
RFCOMM Channel: 0
Requires Authentication: No