You can have a DVD of Creative Suite 3 Master Collection
shipped to you for $24.99. This has trial versions of:
Adobe InDesign® CS3
Adobe Photoshop® CS3 Extended
Adobe Illustrator® CS3
Adobe Acrobat 8 Professional
Adobe Flash® CS3 Professional
Adobe Dreamweaver® CS3
Adobe Fireworks® CS3
Adobe Contribute®
Adobe After Effects® CS3 Professional
Adobe Premiere® Pro CS3
Adobe Soundbooth™ CS3
Adobe Encore® CS3
Plus Adobe OnLocation™ CS3 (Windows® only) and Adobe Ultra® CS3 (Windows only)
Kinda pricey for a 30 day trial, I know, but they don't seem to offer After Effects by itself on a trial disc.