Moodle community sites

Version control of courses is a big lack in moodle.

You could implement a crude versioning system by automatically and regularly saving backups of each course.

There is no sort of locking, but I personally hate that. I much prefer the CVS model where anyone can edit anything, and it warns you if a conflict ever occurs.

Instead of version control, what you have got is quite detailed logging, and that will tell you roughly what has been changed, it just won't let you get back to a previous state.