Railscasts are a Rails developers wet-dream.

Since Ryan created the site, it has been a fount of knowledge for anyone wishing to learn about the latest and greatest tips and tricks. To make things even better, they are free, though PeepCode is also very much worth a look for those of us wanting to glean a little (or a lot) of in-depth knowledge; $9 is a menial sum to pay for what amounts to a full-on lecture!

If you haven’t done already, go take a look – there is even a bunch of screencasts dedicated to Rails 2.0!