Rather than actually showing up himself to spin, a DJ in Philadelphia has taken to renting out iPods filled with his custom mixes to restaurants, stores, and salons. BoingBoing has a good thread going on whether or not this is actually legal to do, since the DJ is making copies of songs for non-personal use.
Philadelphia City Paper – In iPod He Trusts
BoingBoing – DJ in Philly rents iPods to venues instead of spinning vinyl in person