Look up Zombies: A Living History on History Channel. It's the special that I remember seeing before and it does give at least basic info on several different zombie types.
This should be an interesting project if we can get a few other involved. Preferably people who are less lazy than you or me, but the more the merrier. Although I do remember seeing a special or one of the History or science channels that went over many of the main types of zombies that might help you if you can find and watch it.
http://darkencomic.com/?webcomic_post=20031216 Darken is a comic set in a magical land and blah blah blahdy blah. It's really good and the only bad thing about it that I can think of is that is has an end.
My brother just called me a minute ago and told me that he saw a bumper sticker that said "My zombie student just ate your honor student's brain." That is awesome.