I'm just looking for a basic tutorial giving a run down of what they are, how they work, etc. I did a search but didn't find anything. I was just hoping to find something on cgcookie since you guys give great tutorials, and I'm paying for the courses before I went looking on youtube.
It's not a driver dedicated tutorial , but I remember that Kent covered drivers a few times on the rigging section of this course :
https://cgcookie.com/course/short-film-character-production
And also , I know its not a CG Cookie one , but I have worked through the Humane rigging course also and it covers drivers quite frequently in some of the rigs that you create.