I'm curious where everyone learns their action script. Books? Specific forums?
I'd like to take a class, since that's what helped me the most. The last real flash class I took was in 2001, and I forgot more than half of my action scripting since then.
ActionScript has changed a lot since then, too; ActionScript 3.0 is significantly different from ActionScript 2.0.
Personally, I've gleaned my info from a variety of sources, but mostly Flash's built-in help system, websites and forums (such as Adobe's Developer Connection http://www.adobe.com/devnet/actionscript, http://www.kirupa.com and http://www.actionscript.org), and lots of books.
None of them is the be-all-end-all resource, but they all come in handy.
If you're looking for an "Intro to ActionScript"-type course, I think a place like City College (a community college in San Francisco for you non-locals) is probably your best bet. I say this only because one- and two-day ActionScript courses from vendors tend to be overwhelming, and a topic like ActionScript (or any other programming language) needs to be absorbed slowly over time.
The most important thing -- in my mind anyway -- is to know what you're trying to achieve before you start delving into any resource materials. If you don't have a specific goal in mind, it's hard to figure out what code is relevant for you.
Also, ActionScript is a cousin of JavaScript. They have some significant differences, but generally speaking, if you know JavaScript, you can do ActionScript.