[nihilocrat]

Using bzr: our development is done in Python, so it's handy to be able to a) modify things if we need to and b) bundle bzr with our company's python install.

It was the first distributed VCS I have used. I highly suggest it for personal or small projects, as it supports "dumb storage" and thus you can host a repo anywhere you have ftp or sftp access. It is also handy for working around annoying firewall restrictions where you can't really checkout code the way a centralized system does.

[aston]

Mercurial's also in Python. And I think in most benchmarks it comes out ahead of Bazaar. Might be worth a look.