Of course, here's another idea to heap on the fire...
in reply to Tried and True CPAN Modules
Require a live email address, with a round trip of emails to verify, prior to download. Then, in 24 -48 hours, email a standardized survey about the module. Reply-to goes to a botbox, gets parsed, results databased, maybe a free-form comments section gets posted ala amazon.com reviews... etc.
O'course, it's hard for me to imagine many people sitting still for a CPAN-enforced behavior like this.
But, just maybe...