Distributed Version Control Systems

A colleague of mine had a question for me about Distributed Versions Control Systems (or DVCS). There are a growing number of such systems these days: Mercurial, Bazaar, git, svk, BitKeeper, Gnu Arch, darcs, Monotone, Codeville, Arx, just to name a few. I referred them to a good essay by David Wheeler that talks about the fundamental differences between distributed vs centralized VCS (among other things).

I also Googled on the topic and came across some interesting links:

• Distributed Version Control Systems: A Not-So-Quick Guide Through [link added 5/13/2008]
• Wikipedia page on Distributed Revision Control
  
• Eric Raymond's Understanding Version Control
  
• Ben Sussman on the Risks of DVCS
  
• Ian Clatworthy on Distributed Version Control: Why and How
  
• Ian Bicking on Distributed vs Centralized VCs
  
• Another blog-entry on DVCS vs VCS
  
• Introduction to Distributed Version Control Illustrated
• Choosing a Version Control System
• Distributed VCSes: git vs. Mercurial vs. SVN
• Why Distributed Version Control matters to you, Today!
• Distributed VCS for the other 80%
• Distributed VCS Shootout Redux
• The New Breed of VCSes
• Why Distributed VCS?
• Zooko's Quick Ref Guide to Free DVCS
  

Anyone else have any links they recommend on the topic? (please, no spam/marketing)