Probably the nexus for all things Flash is FlashKit --
http://www.flashkit.com/ -- unfortunately, the site may be slow. They seem to be having difficulty keeping up with the traffic load.
Flash does have a steep learning curve, though, so it's good to pick up a book or two: I recommend
Flash 5 Magic and
Foundation Flash 5. There are lots of bad books, so do your homework first. I just picked up the
Flash 5 Bible but it looks like they didn't proofread that text very carefully... lots of errors in it. Likewise, there were a lot of errors in the Flash 4 f/x and Design book I bought a while back... so I steer clear of Coriolis Group titles whenever possible. I never buy books from Macromedia, because I think that just encourages them to write cursory manuals so they can sell more comprehensive "books" later.
