Well depends on how you are building, usually if you are developping in adobe flash, then you will need to know actionscript as well as basic animations to start working on your site, else, try google up something like Creating flash websites, and you'll end up with specific tutorials, as well as some flash builders to help develop
I have to say RJ, very nice - you're obviously very adept at what you do. I'm afraid it's horses for courses though. If I wasn't directed specifically to the site, I wouldn't have entered. Having said that, you've really streamlined the thing - no 'wait while it loads' nonsense.
I'm very visual person. Only flash sites can occupy my attention. When I try to remember of some good web site I wish to visit again I can remember only flash sites. But also, there is lot of garbage made in flash so I understand others who don't like flash.
You can learn from lynda tutorial site its train you professionally for flash.
But note that if your site is totally base on flash so is very difficult for you taking your site on search engine because google can't read flash file.