From reading the discussion boards over at Apple.com, it does work but some are experiencing distortion. So yes it it has drivers (not too sure about 64-bit, I think you still have to find them yourself) but depending if you get the problem or not, you might have to get drivers from RealTek yourself.
EDIT: There is a BootCamp64.exe installer on the install DVD, but again, depending if everything is smooth for you, you still might have to find the drivers from the hardware manufacturer to fix any potential problems.