Eran Stern has teamed with Motionworks in the start of the new Prosentials Series of affordable online training videos. Eran's training is called After Effects TV Spot with Freeform:
"Follow along through techniques for creating a TV spot using Adobe After Effects and DigiEffects Freeform. This tutorial is excellent for beginners and intermediates who want to learn key 3D design and animation skills with After Effects, as well as anyone wanting to better understand how to integrate DigiEffects Freeform (included with AE CS5) into their workflow."
Update: Eran is also offering a free project that creates floating dust using CC Particle World.