Weird trailer. Either they're showing stuff from all over the season or they're really condensing some events.
Like I said in the TWD-thread, I think they really picked up some steam in season 2 (I wasn't all that bothered about the Sophia-thing), so I'm hoping S3 delivers.
On the subject of TWD. I just read Garth Ennis' Crossed. Which is his take on the zombie-apocalypse. He pretty much did in 10 issues what took Kirkman 50. Well recommended. Some really intense stuff.