My pit bull isn't violent, and she is half doberman - another "bully" breed. She is the most obedient, eager to please, trainable dog we have had. She gets along great with all the dogs at the park, too, as well as with our other dog, who is also female.

Loves our kids. here are some links that you may want to check out:
http://www.realpitbull.com/ http://www.understand-a-bull.com/BSL/OtherBreedBites/AllDogsBite.htm
try this out, you would be surprised how often pit bull attacks aren't even pit bulls because they can't identify what breed it really is:
http://www.pitbullsontheweb.com/petbull/findpit.html
and this is a video that I LOVE about how loving the breed is and who exactly brings pits into their family (Helen Kellar, one of our presidents, the Rascals a kid's show!), but BEWARE!!! There are some very graphic pictures from dog attacks
http://youtube.com/watch?v=mYGlM-afPEM
Rachel Ray also has a red nosed-pit bull, Isaboo. In temperament testing, pit bulls scored above the all american family dog, the golden retriever. In fact, all the across the United States the five dogs that bit the most in recent years are: German Shepards, Golden Retrievers, Cocker Spaniels, Rottweilers and Chow Chows. If you take into cosideration the number of each breed and the total bites caused by the breed pit bull ranks number 4... from the bottom. If you want I can find the articles that had the stats, I haven't seen them since last summer when we got our Lucy.
ETA that when I was running with Lucy a couple of weeks ago, a lab mix ran out and tried to attack us. I don't really think that it is the pit, but the lack of a responsible owner. Dogs are pack animals and they need a responsible leader or they will be destructive and potentionally violent. My friend has a pack of 4 yorkies that live across the street from her that try to attack anyone who walks past their yard and has bitten some kids. Yorkies! Little 10 pound dogs! But I will admit that when I pit bites, it counts because of their build and tenacity. But please keep in mind that 98% of all pit bulls will never harm a human being in their life.
Missy