WoW Digger has come through with a non-executable method of getting your character info into their system. When you create an account on the site, you can tell it to pull your profile off of the Armory instead. Then you can go crazy with the equipment comparison.
This method, however, won't collect your current quest list or track your faction levels. And those two features are the two I enjoy the most. I personally feel this site is legitimate and will be using their executable to get the most out of it.