I've just looked over the list of talks at YAPC::NA. There were a couple that looked like they might be interesting. I think I even saw someone giving the same talk they gave last year. I feel like I could have just made something up and had a more interesting talk.
I've recently been reading stuff like CTM which is largely outside Perl's realm of "do-able" stuff. Maybe. In Perl 5 anyway.
One possibility is that CTM is very Oz-specific. For example, I tried the "translate SICP into your language" exercise in Perl, and gave up because of all the Scheme-specific idioms.