Are you suggesting that PM get in the business of professional certification? If so, I don't like the idea. I think that it would commercialize PM; it would significantly distort the character PM now has of a community of people who are simply interested in Perl.
There already exist many commercial outfits (for example, Brainbench)
that offer the kind of service you suggest.
A related question that I find interesting is the one about the connection between such standardized certification schemes and the commodification of programmers. Once programmers can be reduced to standardized certification scores, it is much easier to treat them as interchangeable parts. This is an inevitable development, IMO, just the familiar outcome of familiar economic forces, but it is not one I am particularly eager to help along; therefore I'd be sad to see PM become vested in this process.