I finally saw I'm Not There over the weekend. I thought it was a fantastic representation of Dylan's life and career, choosing to highlight legend rather than explicit fact, sequenced in a manner that befits his mid-60's songwriting. In a way, it intentionally parallels a chief complaint of Dylan's work amongst laymans: it doesn't make any sense.
Nitpicking, I only really had a problem with the way it handles documented reality, like some of the interactions that Cate Blanchett's characterization has with various reporters, and the "Royal Albert Hall" concert, footage of which is now widely available and far more interesting and entertaining in truth than in the fictional representation. In an effort to stay far away from becoming a biopic, certain events are actually dulled down from reality simply to maintain fiction; the exact opposite procedure of nearly all reality-based biopics.
What I took away from it most: we desperately need an Allen Ginsberg biopic with David Cross.