A quick little plug for one of the coolest screencast out there: Railscasts. Railscasts is similar to PeepCode's screencasts, which are kind of "the" Ruby on Rails video tutelage out there. The difference is that Railscasts are free and superficial. And I mean superficial in a good way: instead of an hour-long focus on a deep, rich subject, Ryan at Railscasts is able to bring small tidbits of Railsy goodness to you in a couple minutes. It's the kind of stuff you can do right now to help improve your coding style, productivity, and so on. Plus, it's really easy to spare a couple minutes to learn something new. And, for those of you new to the game, they're not quite basic into screencasts, but they're definitely not advanced material, so it's pretty easy to wrap your head around them.
Ryan definitely is the man. And his voice is perfect for them.