Cool! (Though I'd suggest adding an abbreviation for the make-source-deb function you expressed with that arcane expression...)
dh-make-perl exists, but it is still fairly primitive (aside from the typos in early versions, it hadn't gotten more accurate than my own hand-hacked scripts did) and I think something integrated with the CPAN module is a lot more likely to continue to handle CPAN enhancements... in fact, my scripts started by running the CPAN code and using it to actually pull down, unpack, find author strings and such to populate the control file...