There is also a sandbox page, which is everything an aspiring theorycrafter would ever need to make up the character of their dreams. Punch in a class, race, and gear, and then go to town shifting around buffs, weapons, talents, and anything else you'd want to check. Cerberus is an attentive creator, too-- if there's a calculation off or a piece of gear missing, he seems more than happy to add it in. I only hope that we don't crush the site with our exposure.
The sandbox page mentions something about "locking" the character, and it would be cool to have a quick permalink setup for created characters (we could have someone show off all the buffs/gear needed to get the Ghost Wolf taming cast time down, or show off the highest possible spellpower available in the game so far). But other than that, Warcrafter is a great piece of web-based software. Very cool way to inspect every single aspect of your character out of game.