Oh cool! Someone on a homeschooling email list sent out a link to Free Online Course Materials offered by MIT online! Woo Hoo!
That looks way cool. Then, while browsing around seeing if other schools have that sort of thing I discovered that Stanford has some via iTunes... not quite what I think I'd like but if you just wanted to listen to some lectures it might be fun.
Then I found The Open University which is based in the UK. That one really looks interesting, in fact I decided to play around with that one and registered. You can log in on that site and engage in discussions on the course materials, very interactive and yet free somehow. I'll let you know how it works out. The MIT courses look pretty interesting as well but I'll hold off on them until I've tried out the Open University for a while.
This is the sort of thing the internet really is made for ;-)
This is also essentially unSchooling, you learn what you want, when you want, at whatever pace you want, with no pressure. No "credit" either but I don't care a lick about degrees or credit, just learning new things. As I said in the sidebar of my blog for a while when I had the timer showing how long we've been unschooling with Serenity, we are unSchooling with Serenity. We learn as much as she does. I'm going to have fun with these sites I think.