Here's a prospective Center that could take awhile to develop, but could be worth it in the end. Check out this article.
And this highlight video.
He might be good to take a flier on in the draft, and I think he's exactly what the Rockets would need. A big, athletic, defensive center that could be great in a few years. Just remember, Dwight Howard wasn't the beast that he was in his first couple of years. Nogueira needs to bulk up, get a jump shot, ect... but that comes with practice. I'm not talking about the draft already or anything, just a guy to keep an eye on.