So I maintain (for some value of maintain) a few
Of those, apprentice.perl.org will just go away (it's long dead), and datetime.perl.org will move to my own server (it's just a very low-traffic wiki).
That leaves books.perl.org. This is a custom app, and it's a bit of a mess (actually, a horrible mess, the original died while in the midst of some major refactorings).
My take is that we don't really need a custom app for this sort of stuff, so I'm just going to extract the reviews and make them available as text, perhaps with the idea of putting them in the Perl 5 wiki or something.
However, if someone really wants to keep the site going, I can help you transition it elsewhere. The catch is that this needs to happen by the end of the month. If you're really gung-ho about this, email me at autarch @ urth.org.