Adam Everett Miller has a new workflow tutorial on AEtuts, Enough Lower Thirds To Feed A Small Country, which uses the well-documented CompsfromSpreadsheet script by Mike Cardeiro from AE Scripts.
AETUTS editor Lloyd Alvarez has a new 2-part tutorial, Cinematic Opening Title Redux, with over 80 minutes of training. Using built-in After Effects tools and several free scripts and expressions (listed on AETuts), Lloyd shows you how to harness a large amount of text and quickly format and animate it. I couldn't get Firefox (Windows) to play the videos fullscreen anywhere, but Safari worked.
Update: Graphics Mafia, "a place for those who create sports graphics," reminded me of something related that was noted earlier, Expressions and external documents by Harry Frank, a QT tutorial for automating lower thirds.