Have a look at
Wikimedia. ok, it's written in php, but the wikipedia uses it, it's rather fast and easy.
Also do i like
moinmoin (in python). You might
read this to learn more about it.
i fancy a wiki due to it's flexible nature.
ps. if you want to stick to Perl, look
over here.
"We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise." - Larry Wall.