AKA The Mothership. The place you can get it all (well, Director- and Flashwise, anyway).
Order the Macromedia Showcase CD
It's free and includes lots of samples, plus demo versions of Macromedia products! If you're not sure Director is for you, get this CD; you'll get a save-disabled version of Director (Mac and Win) that at least lets you toy with its possibilites. Between that and the free file downloads here on nightwares, you can really get a taste of Director's power.
Like the site? Buy the book! Director 8.5 Shockwave Studio: A Beginner's Guide by Warren Ockrassa, published by Osborne-McGraw/Hill; preview it now!