MathaisX and Arlen Walker gave a great "intro to git" talk at BarcampMilwaukee4.
Git is an open source version control system. I have read about writers using GIT to great success, so I wanted to see how I could use it.
I took terrible notes, and got distracted trying to play along, especially because I'm not a code guy. I mean, I'm pretty-- I don't compile from source. Couldn't get MacPorts to work on my MacBookPro to do the package thing, so I gave up. And, even when I was paying attention, I was quickly in over my head.
Today, moving a bunch of files around on my Ubuntu test server at work, I realized It would be smart if I put Git to work for me there. Thanks to the magic of apt-get, a half-hour later, It was done. I'm using Git. Sometimes, even open source just works.

If you're an idiot like me and think you might want to play with Git, here are some links:

• My Notes from BarCampMilwaukee4
• Getting Started First-Time Git Setup
• Helpful discussion as to what my the error message was about.
• Git Source