MyiPhone.com put up a clip of my favorite section of last week's Macworld Keynote. When Steve's clicker went down, he told the story of how he and Woz built TV scramblers in high school and punked people with em by jamming their Star Trek. It gets good around the 40 second mark.
Woz was giving a talk here in New-Brunswick,Canada (who woulda thought) and someone asked him about it. He said that at one point he has a guy standing on a chair with his arms overing over the TV. Everytime the guy would try to slowly move his hand away from the TV, he would scramble it again.