Here is a list to basic previews and start dates. http://neregate.com/blog/wp-content/...1-Anime-v6.jpg I am not 100% sure on the accuracy though since I am almost positive Ika Musume starts on the 27th, not the 26th.
This is my favorite site for episode reviews and such : http://randomc.net/ He usually does a really good season preview each season with good write ups and expectations. It isn't up yet, but should be later this week.
Edit: I have not looked at the season chart in awhile and it looks like it has been updated to include Zero no Tsukaima Kessakusen. It is not the 4th season, but a prequel that will contain select episodes from the previous 3. I guess that might have been the source of some of the confusion over when the 4th season will air. So it looks like it will be in 2012 after all. Do not think I have ever seen another series do something like that, though. Pretty odd.