apologies for the title, it's a blatant rip from the website, but I really didn't quite know how else to describe it
<a href="
http://www.ted.com/index.php/">TED.com</a>
A friend of mine put me onto it a couple of days ago and I just had to share it - it's a series vid's of presentations on a wide (wide!!) range of topics
Many are fascinating or thought provoking, though some seem a little bizarre in that context (like the guy miming DJing)...
enjoy