It's only right that the Denver Film Society's Film on the Rocks series should fête Woodstock's 40th anniversary, considering that the event, the music and the movie have become inseparably melded in our collective consciousness over time. Besides, FOTR is all about a similar gestalt -- so of course they added the date, which coincides with the Woodstock anniversary frenzy. And flashback fever is only getting started, since Ang Lee's much awaited film Taking Woodstock doesn't open for an