Hi Jeffro,

This is actually a really good starting point for plugin developers. They can probably also get involved in the community via social media and share it there as well. Perhaps share it on managewp.org as well.

Trip back in time: I have a draft post from 2007 outlining how to promote your plugin. It basically said to post an item in the news section of weblogtoolscollection and to submit your plugin to the various plugin lists / repositories that existed at the time. I never published it because most of the repositories went under not long after (I did write about that in Feb 2008!). Man those were the days...