I believe that the Harmony remotes by Logitech use Bluetooth, but 
don't know any other ones. As I have no idea how these Bluetooth 
remotes interact with computers, I can't say whether they will be 
supported.

If you don't have a remote coming with your Mac or being able to use 
a remote without a line of sight, the Keyspan RF remote for Front Row 
(=> see supported remotes) does currently give you the best value for 
money IMO. It's not a beauty, though ;-)

Best regards, 
Felix