Camby took money from an agent at UMass. Most believe that Calipari didn't know or have anything to do with it. At Memphis, Derrick Rose had his brother take the SAT so he could get into school. That's something the Rose boys were going to do regardless of where he tried to go to school. Did Calipari know? Who knows.
But to me, neither sitiation is anything like Tim Floyd at USC standing on a street corner handing a guy $1000 to help make sure a player comes to his program. Don't forget too, that Calipari was at UMass for 8 years and at Memphis for 9 years, and out of all that winning (441-138), only two individual players are in question, and both from things that were more specific to them as individuals than a coach committing widespread recruiting violations or academic fraud or anything like that. Maybe the famous "lack of institutional control" line fits a bit. But again, that's over the course of 17 seasons, and neither case uncovered widespread cheating or violations. They were specific to two kids.
All in all, skip to the 30 second mark of the video below to see why I think this is a good hire.