Michael Mann Forum

If your looking for a really great series of video essay's on Mann's work, check out Matt Zoller Seitz's work over at movingimagesource. It touches on Mann's work from Thief to Collateral and is incredibly insightful.  
 http://www.slantmagazine.com/house/2009/07/zen-pulp-the-world-of-michael-mann-pt-1-vice-precedent/

That's absolutely fantastic. Good find. Collateral, Heat, Thief and Manhunter are some of my favourite films ever, granted, I fucking hated Public Enemies and was incredibly disappointed by Miami Vice but that doesn't detract too much from the classics.