Start one of those "If you like flowers, make this your status" updates and incorporate whatever sort of affiliate junk you want. For example. "The new Paranormal Activity movie is awesome! ...bla bla bla...If you like Paranormal Activity show your support and make this your status update...bla bla bla" Find some offer for the movie, put that in somewhere and then get your friends to post as there status and your off.
Or you could just send them stuff that you know they are interested in...like if they are hockey fans get them to signup for hockey updates or something.