Telltale announced today that The Walking Dead: Season Two will premiere later this year. It is available for preorder for PC and MAC from the official site. The press release reveals a bit about what we can expect:
The Walking Dead: Season Two - A Telltale Games Series will continue the story of Clementine, a young girl orphaned at the outset of the undead apocalypse, now left to her own devices to seek safety and survive in a world gone mad. Now assuming the role of an ordinary child, players will struggle to outwit both the dead and the living in situations that will test their morals and control the flow of the story through their decisions and actions.
There's also a trailer:
A Game of the Year Edition of the first season will also be released next month for PC, Xbox 360, and PS3. It will include the 400 Days DLC as well as the soundtrack and a behind the scenes video.
Source: The Telltale Blog