We have had a dozen chickens for about 10 months now. They have provided us with both eggs and quite a bit of entertainment. The "ladies" have been laying since August. We average 8 to 10 eggs a day. The eggs are quite good and a hit with my friends and co-workers. To cut down on the noise we opted to not get a rooster. If there is one drawback it's the hens are all democrats. They spend all day softly clucking "BAARRAAKK, BBAARRAAK". I've threatened them with a swim in the "Hot Tub" but they persist.
As for the breeds I have three, Rhode Island Red, Plymouth Barred Rock, and Americanna. The Reds lay LARGE brown eggs, the Rocks will lay brown or pinkish brown eggs and the Americannas lay sage green, blue, brown or pink eggs.
There is a supplier in Cameron Texas, Ideal Poultry ( IDEAL POULTRY - Chickens, Ducks, Geese, Guineas, Bantams, Chicks, Turkeys, Poultry, Birds, Fowl
). We haven't used them yet but I know several people that have. You might want to check out the magazine "Backyard Poulty" as well. . Good luck with your flock!