i'll second the recommendation for railscasts. subscribe to it in itunes, watch them every week when they come out. they're not long or hard to follow, and you'll learn a lot of good material.

i've been using rails for 4 years and i still continue to learn a lot of useful things from railscasts. sometimes it's not even the topic of the video, but just some minor shortcut or rails'ism that i didn't know about.