I had an American or Stafordshire Bull Terrier (vet wasn't totally sure which it was, and I got him at 14-18 months from the pound). I've never had a dog who was so kid friendly. For months, unknown to me, the younger kids in my neighborhood would come home from school, take my dog out of my back yard, and go play with him at the park. They would put him back shortly before I came home to find my "lazy dog who's always sleeping when I get home."
He had a few traits that made him ideal, as far as I was concerned...
1) He would protect ANY kid from any perceived threat. He would get between the kid and another dog and make damn sure that dog couldn't touch the kid.
2) He never, ever started a fight with another dog as far as I ever saw or heard. Other dogs attacked him on several occasions, but he never started it. He was totally cool with other dogs, unless they got in his face. Then the "other" side of my dog would show up and start ripping things up.
I saw him get full on attacked by some dumber-than-should-live poodle once. Poodle came in running and totally blind sided my Bull while he was looking up a tree at a squirel. Poodle drew blood too, which was not a good thing. I had to sprint 60 yards to get to the fight and pull my dog away. There were chunks of poodle on the ground when it was over.
3) I was working out of town a lot back then, with my wife left at home. I have to admit I felt more secure knowing that dog was there to slow anything down long enough for my wife to get her Berretta 92FS into play, should the need arrise.
Pit Bulls, Bull Terriers, Saint Bernards, what ever. They can all be mean, and they can all be cool. Just depends on how their treated. With the media hype I can immagine some anti-bull terrier laws. If that's the case, some other dog will become the next "most agressive" media hype tool. That's what it all boils down to anyway, the media just want something to yell about so that we will pay attention and buy their papers.