i recently sat in on one of joshua davis's workshops in toronto and had a good look at hype--an ActionScript 3.0 class library for creating scripted motion graphics. simply put, hype is nice. joshua and branden hall (hype's creators) have done a great job wrapping powerful and complex features in an elegant, easy-to-use api. definitely worth taking a look if you're a graphics professional or game programmer looking to add scripted animation, interactions, and effects to your projects. tons of clean examples at hype's home:
>> http://hype.joshuadavis.com