Bazaar is DVCS written in Python, known for its very easy setup and good portability across all major operating systems.
See parent wiki page Action items for moving Drupal.org off of CVS for more generic information.
(start writing points already!)
Bazaar homepage: http://bazaar.canonical.com/en/
Bazaar is the way to go if Drupal wants to lower barriers to contribution- Git has a steeper learning curve.
- Bazaar might be an easier migration for cvs/svn users
- Bazaar is easy.
- Bazaar offers much of the same power-tool flexibility that advanced git users love (such as patch-level commits and intelligent merging), without sacrificing simplicity.