At least he's admitted that he has a problem, and by doing it on TV he's going to be raising awareness of these sorts of problems. He shouldn't be punished, he hasn't actually hurt anybody. If anything,we should be offering him help - he's trying to do something about his problem, most people like that aren't.
I think that sometimes people forget that pedophilia has been around for ages, it's just over the past few decades that it's really even bought into the limelight. It'd be wrong to punish the one man admitting he has a problem, when there are thousands of child molesters out there who've committed terrible crimes, yet still aren't being caught.