OS X: Is there an open source screen recorder? I need a screen recorder. However, I try to avoid using closed-source software whenever possible except from major vendors like Apple and Skype. 

I am wondering, is there an open source screen recorder for Mac OS X? 

Or if not, does Apple include such a thing with the OS? Or how about using Skype? I'm running Snow Leopard.
You've answered your own question, but I thought I would flesh it out a bit.  

You are correct that QuickTime will record a window, or the whole screen, but it only does so with the version of QT that ships with Lion. It wasn't available in earlier versions of QT or OS X (I'm not sure if the latest QT would do this on an older OS - I don't have one to try it on.)

I was pleasantly surprised to see that it now had that functionality - there really aren't any other free or low cost options.