Currently Being ModeratedJun 30, 2013 12:33 PM (in response to bgrenfell)
There is an Airport BT card but it has some drawbacks.
You will also want 10.6.3 DVD (retail) or Lion (it won't install 10.8)
OWC www.MacSales.com is the best bet for checking to see what if anything they have.
Currently Being ModeratedJun 30, 2013 1:00 PM (in response to bgrenfell)
Amazon has both cards available. Do not get a third party device, they are poorly supported and may not work with Apple's built-in software.
Apple Airport Extreme Card MA688Z/B
Apple Bluetooth Module Upgrade Kit MA687ZM/A