We have used a variety of version control systems in the past. My current thinking is that git is the next one true path, as it seems to have the largest open source developer market share.

Unlike subversion distributed version control system don't require that you have administrative privileges to start using version control for your small project.

GIT

Learning Git

Official Git Tutorial
Everyday Git
Git documentation
[BOOK] Version Control with Git

Using Gitosis

Local Git hosting

Converting from svn

Convert from svn to git - detailed walk through. (though appears to assume git 1.7.0 or higher)