Here are some App Inventor tutorials:
Talk To Me (part 1), MIT App Inventor Tutorial #1 from MIT App Inventor on Vimeo.
Talk To Me (part 2), MIT App Inventor Tutorial #2 from MIT App Inventor on Vimeo.
Ball Bounce, MIT App Inventor Tutorial #3 from MIT App Inventor on Vimeo.
MagicTrick Tutorial from MIT App Inventor on Vimeo.
are the bottom videos actually tutorials or are they introductions? also, how are they going to help us?