Steve Jurvetson: The joy of rockets

Amazing what some backyard rocket scientist can do these days!

Johnny Lee: Wii Remote hacks

If you ever wanted to build your own whiteboard, this is a way to do it with just $30 instead of several grand. All you need is a Wiimote and some form of IR LED. Great thing for schools who are low on money.

Clifford Stoll - 18 minutes about... well, I can't really explain

Cliff Stoll is an astronomer and was one of the heads behind the investigation of the Markus Hess / Karl Koch hacks to sell U.S. military information to the KGB in 1986. He wrote a book and a TV documentary was made called "The KGB, the Computer, and Me", which is available here. He is also known for his "weird, but lovable scientist" demeanour and for making Klein bottles. And for lots more. I wish my science teacher was like that.