Iverson has his own shoe and athletic apparel clothing line with Reebok. Jay-Z also has a shoe contract with Reebok as well. The S.Carter line is one of the biggest selling shoes in their history.
Personally, I think Reebok shoes are crap.
I prefer Adidas or Nike myself.
Shaq, I'm pretty sure, has his own shoe line, although I don't remember if they are affiliated with a smaller shoe line, such as And 1, or if its his own label alltogether.
Baggio, I read your PM. I hope that everything goes well.
PS- No wonder you kicked his ass, he was playing as the 49ers. Take it from a fan of theirs, they SUCKKKKKK.