There are two other topics I think they should cover:
Because it would be cool seeing Penn and teller look and act like pirates (if only for the opening bit). And because I would LOVE to see them take on the RIAA and all their lies and BS (their legal tactics are something to be despised by all).
2. Airport security.
I read somewhere that Penn really wanted to do a show on airport security but because you can't film airport security he says they couldn't make it work for TV. I'd like to see thme try anyway and hopefully they could get it to work because I'd like to see what they have to say about it (and of course the jokes they can make about the 'no bomb jokes' rule have the potential to be really funny).