"I spend every day writing Rails code in vim, and I’ve optimized the heck out that process. The screencast contains the best of what I’ve learned for creating and editing Rails code at top-speed. Come look over my shoulder and I’ll show you my best stuff." Might give this a pop at some point.

"The Simplest Screen Recording App For Your Mac. Ever." Looks it. I'm fed up of wrangling things like iShowU, so I might investigate this.

This was actually a pretty good tutorial for the jQuery UI Slider control, if only for illustrating how much code - notably markup/styles - you have to provide before the slider works.

GitCasts: screencasts about git. Does exactly what it says on the tin.

"Castanaut lets you write executable scripts for your screencasts."

More Peepcode goodness. I really don't get on with Prototype (I'm a jQuery man, myself), so this will probably be worthwhile.

Nice overview of procedures for making a decent screencast on a Mac - and various useful tools to do so.

Lots of great screencasts demonstrating the new CS3 interface and functionality

Clickable Omnigraffle prototypes which export to clickable PDFs. Very nice; makes me want a new version of Omnigraffle to replace my copy of 2.0...