Is Jack McClellan in jail now?

I did check on this. McClellan's famous (or infamous if you prefer) publicity campaign pretty much ended in 2008. The website he hosted no longer exists and the domain name is up for sale. All references to him have not existed since then.

McClellan was never convicted of a crime, though he received constant attention by law enforcement authorities. For this reason he has been permitted to drop off the map of public attention.

I would hope, for his own sake that he received psychiatric help. But from all appearances his 15 minutes of fame are over and he has vanished into obscurity. Maybe he realized that being a self proclaimed pediophile is not a good thing to put on your resume and that its hard to get a job when your future boss finds your name liked to pediophilia on a Google search.