Update: Turns out I missed ignatz's reference to ActiveState, point is still valid though.
In addition to all of the points made here I would like to point out that ActiveState will (and does) support thier own distros of Perl and the suite of Perl Dev tools you can get from them. I does cost money, but I don't know many vendors that don't charge for support.
"Nothing is sure but death and taxes" I say combine the two and its death to all taxes!