Here's a scene from a new film starring James Franco as Allen Ginsberg. Ginsberg was not my favorite of the Beats (I'm more of a Kerouac man, meself) but it looks like a really interesting film.
As someone in I think a NY Times review said, Franco is good-looking to the point where we don't give him credit for being able to act. But I think he acquits himself well here, at least in this short clip. If you've ever seen video of Ginsberg, the mannerisms and syntax are really dead-on.