I hope this isn't too off-topic, but since this is the perfect mix of hackers + people interested in education...

Quizlet.com is the startup I'm working on and we're also hiring. We're a for-profit but strongly educationally focused web company trying to help improve the way people study online. Different than (complementary to) Khan Academy, but gaining traction with 1M+ registered users. Get in touch if your interested.

Cool! I hope they can get a better way of drawing text on the videos. It gets a bit illegible in this one:

http://www.khanacademy.org/video/introduction-to-differentia...

Oh man I wish I lived in SF and I wish worked for them! As a mostly self-educated autodidact-hacker-math-type, I get their mission. They're one of the few websites out there for which I would drop everything to pour myself into fully. Unlike say the 5,000 hype-driven profit-driven web startups who are just copy-cloning the flavor-du-jour amongst each other, and who have no hope of any tenable business model. And they all mimic Apple or Facebook in saying "we're going to change the world", which is complete hyperbole as the true intention is for the business guys behind the curtain to extract profits.

Khan Academy will change the world!

Alas!