Telltale games will be releasing The Walking Dead game based on the graphic novel of the same name. Should be out mid 2012. It will have episodic content, so kinda like back to the future, and will concentrate on the human emotion side rather than the 'take on the horde' style like other zombie games. I know there will be a load of 'Another not needed zombie game ' but if done right this could actually be a nice little survival horror title.
1st Q&A with dev below