Unicomp makes (modifies?) Model-M type keybaords that are Mac-ish; I've got a Command and Option Key, the F keys do the same thing as the ones on the Mac (change volume, brightness, etc.). I love it.

Tell, me, how do you connect your Model-M to the Mac? I bought this from Unicomp because IIRC just adding a USB adapter to the three Model-M's in my closet didn't work out.