I liked this video on the Italian Tubular Cast-on. I am now to the point where I want to learn some different cast-ons for my knitting. This one is cool. There is also a good demo written on knitty.com that I like here. The YouTube for this type of tubular cast on is on knitting daily and I'll post it too, probably above this one. Very cool stuff!
The video should point you to part two at the end of it.