If you consider yourself a zombie expert, then you should know your zombies. Jason Thompson created a 24″ x 36″ poster that classified over 350 zombie types. It covers all the important zombies in every form and the project is currently up on Kickstarter. If you want your own copy, head on over to Kickstarter and back his project!
(Via Nerd Approved)
For an in-depth field guide to zombies, check here: A Field Guide to Zombies.