Yeah Bullshit! is an excellent show.
These are good too:
Pirates of Silicon Valley
Docu-drama about the beginnings of Apple Computer and Microsoft. Really well scripted and acted and as far as I can tell it's quite accurate too.
The History of Video Games
Mostly about early video games and how the industry was started.
The Corporation
I used to really like this documentary but I'm not sure if I agree with it 100% any more. Nether the less, it's very well made and very interesting.
The History of Hacking
From Phone phreakers to computer hackers. Lots of nerdy info to be found in this one.
The History of the iPod
Exactly what it says on the tin.
The World's First Time Machine
IIRC this one is about how new advancements in physics may soon allow of some kind of a time machine to be created. Obviously not like the ones in film but one which would allow people from the future to send messages back to any time in which the machine has been switched on.
Hitler Speaks
Computer software is used to lip-read old home movies made by Hitler to hear what he was saying. Pretty interesting.
Parallel Universes
More physics stuff.
The Century of Self (part 1)
The history of PR and how it was discovered that crowds could be manipulated using Freud's theories.