For those who don't have the patience or bandwidth to watch them online, Adrian at McFilter has bundled up a DVD you can download using bittorrent and burn to watch at home. It's all legit because they are published with a creative commons license.
The Ken Robinson talk contains one of my favourite Ted anecdotes:
Ken to 5 year old Girl: what are you painting?
Girl: I'm painting God
Ken: That's interesting - I dont think anyone knows what he looks like
Girl: Well they will in 5 minutes!
Here's the link