[craigmc]

Great response. Anyone using your site today and thinking that it is close to being the finished product... well, presumably they've never been in a startup office and looked at the massive roadmap of features, ideas, entire new sites, etc., scrawled on a big whiteboard.

I've had a play with codecademy and I think it is a promising start. As someone who fairly quickly falls asleep whenever I have to read or watch videos for extended periods of time, this sort of (guided) learning-by-doing definitely appeals.

Of course, education is fiendishly difficult to do well at scale, and you are definitely right to be focusing on what motivates people to learn... However, I don't envy you having to figure out what are the best bits to adopt from the sum of all the research done in this area!