You don't need to run your own cvs or svn repository. I use Sourceforge for my modules. As for the rest of what's involved in maintaining a module, I suggest taking a look at a well-respected small module and nicking all the good ideas. At minimum you'll want to publish an email address for people to contact you, and keep an eye on rt.cpan.org. For the lazy people in the audience, I have a nifty shell script that automatically subscribes you to rt.cpan RSS feeds. Email me if you want a copy.