I most wholeheartedly agree with the parent. I'd like to add, however, that a POD section granting an overview of the module is most helpful as well.
Poke around on the CPAN docs -- many of the modules there are well-documented. Combine that style with that of jplindstrom above, and you have superb documentation that is both in-code and extractable using any one of the pod2 tools.
The existence of pod2html also means that your documentation will be intranet-publishable, which looks great to your project manager.