If your new to AS3 then you really should go and watch some videos by Colin Moock who is well known for his Essential ActionScript 3.0 Book.  Colin does a great job of showing you stuff with out the lecture, so you’re sure to learn and enjoy what you’re watching.

Head over to Adobe to view a few hours worth of video.

http://www.adobe.com/devnet/actionscript/articles/lost_as_weekend.html