Everything you wanted to know about...

Flash - the latest "buzz" in web design. For the newbie, this is a good place to start:

WebmasterBase : Tutorials : Flash

Ok, after checking out a few tutorials, you're ready to dive in. But, not everyone has the ca$h to buy Flash 5. Not to worry, check out the "Tools" sidebar and download SWiSH. Try your had with the shareware and then go from there.