Coming soon from Mantic via Kickstarter, and based on the comics.
So if you want non-comic-style miniatures of the survivors from the TV series there are... oh, nine or ten companies making them unofficially, not least Zombicide, Hasslefree and Studio.
And Macfarlane Toys making them officially but in a weird two-inch scale in limited playsets. And Gentle Giant in army men scale.
Update: Kickstarter is up, revealing various panicking humans.