The iOS version at least. That week has daily releases on every platform under the sun with our Apple devices ending the festivities. Now this is DLC for the original game and covers five seperate stories. The iOS port is not up to the standards of the PC or console versions, but it is servicable, and we expect this to be no different.
If you enjoyed the first season, this is a no-brainer. There is a reason that The Walking Dead won so many awards last year for the emotional investment it took out of most of those who played it without offering much in the way of gameplay outside some really tough moral choices. We'll see what 400 Days adds to what transpired at the end. Here's the trailer again for those who might have missed it.