I love playing Fight Night Round 3 but it's the same crap everytime. The guy comes out and throws 140 punches a round until he runs out of stamina and then is easy pickings. And the difficulty setting means nothing, they just throw more which in some ways make it easier.
http://ps3.ign.com/objects/142/14252467.html This will keep you up to date as well. Hopefully there will be a stupidly massive roster.