Cate Blanchett as Bob Dylan in Todd Haynes's impressionistic biopic I'm Not There. Even better: David Cross as Allen Ginsburg.
I'd say she captures him pretty well. The just-released official trailer has brief clips of the other five Bobs. Hard to say at this point whether the movie will be brilliant like Velvet Goldmine or just a fascinating mess like Masked and Anonymous (which despite what you may have heard is worth a rental, and not only for the amazing music).
Update: Best YouTube user comment: "what the fuck?... Tell me anyone is gonna be able to whach that without thinkin... 'thats a fuckin chick playin a dude!'. the director or casting person should be shot.... by a chick dressed as a dude"
