If you are at all interested in distributed SCMs, take a look at Bryan Sullivan’s Foo Camp presentation. The PDF presentation lays out the rationale and general train of thought behind DSCMs.
In other news, I made a passel-php source repository available. This repository is slightly different from our SVN in trac, as it incorporates the code for Wordpress. I’m trying convince a Drupal person to write a module that enables Passel SSO. :)