If you haven’t tried git, you should. Git is a “distributed version control” system, that is, similar to Subversion with the big difference that… you do not need a server. There are only clients, any of them, and you can pull and push changes to and from other repositories from your project colleagues. The git Wikipedia entry does a much better job than me to introduce the subject :)
In Mac OS X, I’ve just downloaded the source code tarball with the latest snapshot of the code, and it compiled out of the box. Just the classical operations:
$ ./configure $ make $ sudo make install
Then I went through the tutorial, and frankly, I loved it. The Everyday GIT Guide is excellent too to understand the idea of this beautiful piece of code.
It’s too cool, really. Lightweight, and damn fast. No wonder why everyone’s talking about it lately!