This show premieres Sunday at 10 eastern on AMC. Its a 90 minute episode. IGN reviewed it and it got 9/10, although I was expecting it to be good because Frank Darabont directed the premiere. Unfortunately the first season is only 6 episodes but hopefully it gets picked up.
If anyone is interested in reading the comic, which is really good, a little googling involving torrents should set you up just fine. Currently there are 78 issues out I believe and you can find torrents that have like 1-72 and stuff like that. You'll have to download CDisplay though to view them, or at least I did.
It's already been renewed for a second season.