This email is a bit off topic, but I thought it might be useful to any developers who are making screencasts. I've written a little ruby script called ghostwriter which uses apple gui event scripting to produce applescript that makes it looks like you're typing. I've found it very useful when for making demo code, because unlike me, the computer never makes a typo!
It's available at http://www.had.co.nz/ghostwriter/
Hadley