I'm not sure exacly what's going on with Superboy these days. For a while there was Kon-El, the clone with DNA from Superman and Lex Luthor. He was killed off but brought back later I think. Maybe he's running with Young Justice now? Then there's Jon Kent, the son of Clark and Lois. Sometimes he's depicted as young, teaming up with Damian Wayne as the Super-Sons and sometimes a bit older, where he's with the LSH. So, there's anywhere from 1-3 Superboys currently out there. I think things were a lot simpler when Superboy was just the Adventures of Superman as a boy!