Greenberg the film was not very good in my opinion but the guy who made it previously made a film called The Squid and The Whale which I thought was good.
I think his name was Noah Baumbach, or maybe it was Jonah Baumbach, or I might be confusing the whale theme to his film there. Anyway, looks like he was an item with Wes Anderson or something, but that's hardly germaine I suppose.