We've added a new "Under Development" Page to the Wiki. This is serving as a bit of a cliff notes to the OpenROV forums, with links to relevant discussions and directions that members of the community are pushing the development. I think it could eventually help to organize different teams who are working on different aspects, but this is a good start for now.
Also, as Simone mentioned, this shouldn't be confused with the modular extensibility of the OpenROV, which is a high development priority as well. Simone also came up with my new favorite word, "thinkering." Awesome!