Judging by this first Internet-only teaser trailer for "Zack and Miri Make a Porno" it seems to be an odd collision of Judd Apatow and Kevin Smith.  On the one hand, you have this odd riffing that seems to be going on and it's the kind of improv that's familiar to Apatow's crew (watching the extended takes on the DVDs of his movies is a distinct pleasure).  But on the other hand, you definitely have the filthy language Smith is famous (or infamous, depending on your sensibilities) for.  I'm still not sure what to make of this film, but I do know that Seth Rogen and Elizabeth Banks are great so check it out: