Dear Volumio team,
with the final release of Volumio 2 and some people working on third-party plugins, I think one important question is still unanswered: What to do when the plugin development is finished? How can people get their plugin to be shown in the Plugin Search? Someone suggested to issue a PR on Github, but mine has been unanswered for almost a month. So I guess this is not the proper way.
After this topic has been solved I will update the docs pages accordingly.