I've been a fan of Bazaar for a while now, using it for all of my personal projects. I store the history of these projects on a central server at work and when I make changes on any computer (my laptop, a lab on campus) I push the changes to the central server and then I'm able to get the latest version of my work on any other computer. In this sense, I use a Version Control System (VCS) as a synchronization solution. Less frequently, I make use of the history tracking features of a VCS. Until recently, when I started collaborating on a software project with a student (GooeyStat).
He is hosting the project at Google Code which provides free hosting to Open Source projects like this. Google also provides only Subversion source control (okay, they also have a limited pilot program for Mercurial). So, when I wanted to start contributing to GooeyStat, I didn't want to give up the Bazaar interface which is so faimilar to me. So, I installed bzr-svn which is a plugin that allows Bazaar to interoperate with Subversion repositories.
