Unfortunately only for "instant bookable places":

http://blog.9flats.com/9flats-accepts-payments-with-bitcoins/

Most places are not "instant bookable", as "instant bookable" means the host doesn't have a chance to review the deal before its accepted, so they are more the places which function as a hotel and not a private house.

So I just placed a request for one place there, but unfortunately I had to give my MasterCard, ugrhh!!!