He wasn't a bad pick late in the 2nd round, but how is a guy who at best is a backup center be the best pick in the draft. He is big, slow, and a sloppy player. He won't be able to see the floor against a lot of teams because he isn't quick enough to guard anyone. They can't possibly put him out there against Howard, Bosh, or Jefferson. He might be able to give Wallace a break when they are playing Cleveland or Houston, but those kind of teams are few and far between. He was great in college, no doubt, but so was Paul Davis. So was Evan Eschmeyer. If everything works out perfectly, maybe he can be a poor man's Chris Kaman or Brendan Haywood. I'd settle for him being Joel Przybilla because that means he'll be in the league for 10 years, but that isn't a guarantee.
He was the best guy for the Bulls needs at that point. It never hurts to have a guy who maybe isn't the fastest, but who can at least take up room down low and who at least has a decent scoring ability in the post. At #49, unless you get some strange unknown steal, you aren't going to get any better than that. Just getting a player who'll make your team at that point is great.
Also, JamesOn Curry is going to make the team. He is extremely talented, is a smart ballplayer, and has a beautiful shot. I don't know if he is going to make it out of the gate as the backup PG, but he'll certainly keep the Bulls from retaining Andre Barrett.
No, he can't play and defense, and that won't fly with Skiles and Pax. On top of that, he's a steaky shooter and can't pass the ball. His ball handling isn't even very good, and he's not smart at all. I saw him play enough at Oklahoma State to see that he's not going to even be a decent player in the NBA. If he's lucky he'll be able to sit on the bench the whole year, but that's even a stretch.