The Bluetooth board is right behind the optical drive, next to the hinge.

It's very nice that Apple moved this out of the display assembly (where it is located in the MacBook Unibody and 15" MacBook Pro Unibody). No longer does a Unibody owner need to replace their entire display assembly ($$$) when their Bluetooth goes out.

It has an Anatel logo on it: BCM93046MD MINI 003WWA080264 FCC iD:QDS-BRCM1037.

Like the other Unibody machines, the Airport card is in the display assembly clutch cover.