Pacino did lend his physical likeness to the Scarface game, but you're right Geoff, his voice won't be used. His voice has changed quite a bit since 1983, so much so that both he and the developers deemed his voice unusable. There were open casting calls for the voice-over of Tony Montana, and they seem to have found an exceptionally suitable voice actor (whom Pacino had the final say in hiring).

There's a pretty in-depth article on both The Godfather game and Scarface game in the March issue of PSM. You guys oughta check it out if you can still find it on newsstands.