March 9, 2006
You know how one thing leads to another...
I wanted to spend some time boning up (ever wonder where that term comes from?) on the competition and somehow I wound up at Digital Tutors Web site which was a new discovery in itself for me, and I saw they offered free (well almost free if you don't consider watching a commercial before the content a price to pay) tutorial videos on After Effects.
Even though the tutorial was created using an earlier version of After Effects, the principles are still relevant in AE7 and the good news is that in After Effects 7.0 we added a feature so that you can now rename your layer and effect controllers after you've created the expression and the expression will auto-update (so if you are using AE7, you can ignore the part of the movie where the expression breaks).
Note: I haven't checked out their other free tutorials or their commercial products, so please don't take this as endorsement for Digital Tutors, but the expression tutorial was a good one.