An idea to implement this given current monestary facilities (or at least mostly ;) )

Create a new section "Module Reviews". In this section the module name is used as the title and maybe part of the synopsis or just a link to CPAN is the body. Then we use the keywords nodelet to 'tag' these modules with things related to them. Add a simple directory of that category and use the existing rep system so that those modules can be ranked by rep. (You could always alter the owner as is done in Q&A or something so that it isn't a personal rep battle.) Then also add an index that is a sort of tag cloud that would categorize modules. To me this sounds like a nice thing, as sometimes its hard/impossible to find module on CPAN unless you know exactly what to search for, with a nice tag cloud you could hopefully make finding related modules easier as they would have related tags even if there names varied greatly.

Would this requrie some modifications? Yes. But the modifications would all add value and are not 100% necessary for such a section to function. Personaly I also think this is different than a modules review section as reviews are a single persons oppions. These Nodes could server as a home for conversations about the modules in question and maybe reviews could be tacked onto the original node, or linked to in replies to it (maybe thats where the wiki idea someone else mentioned comes in, so that everyone can add links to the main body).