I'd never heard of this until the other day when i was talking to a 'non-guitar but big rock music' enthusiast. Seems to be more of a feature documentary along the lines of 'Lemmy: The Movie' but focusing on the Electric Guitar in general, Jimmy Page, The Edge and Jack White in particular.

http://en.wikipedia.org/wiki/It_Might_Get_Loud

Anyone seen it? Thought and opinions welcome as i'd like some before blowing a Lady Godiva on Amazon!