Both of the ladies I regularly assist used to use film, and now offer it as an option, though in over two years of assisting these shooters, *not once* has a client requested film, and only *once* have they wanted even 4x6 proof prints. They want the files; plain and simple, and a web gallery. Using film for these services would be prohibitively expensive. Getting good processing and scans of near 1000 pix-worth of candids between two shooters would cost an arm and a leg, and what is the point of shooting film when the client wants a web gallery and electronic files? Out of sheer coincidence, both bosses use exactly the same cameras: Contax 645s and Canon A2s for film, and Canon 5Ds for digital. (I use my 10D and a borrowed 1D Mk. I or II with them.)
I think if I shot weddings by myself, my only option would be film, as all my best equipment is for film. I would probably use my 645 1000S and Canon FD stuff, and possibly my C33 or RZ 67 from time to time.