Thanks for posting this... bookmarking it for the answers. I'm early-thirties, too, and while I finished the first year of calculus (10 years ago!), I screwed up and got a PoliSci degree. Now I'm looking at maybe going back for CS, but I need to relearn trig and calc so I can finish the physics and diff equations prereqs. It would be nice to not have to spend a year retaking the classes.