The discussion on cross-platform and what to do is still ongoing. We've discovered that OpenTK works pretty well (Remember the ReMoO project that I started a few years ago? Laszlo was able to run it after simply updating references in MonoDevelop). So we might stick with C# but convert to OpenTK. We're determining which of the two choices (C++ and 2D engine, or C# and OpenTK) we should pursue at this point.
Finally, here's a screenshot of the Fleet Overview:
The idea is that you can click any fleet, and it'll take you to that fleet in the galaxy view.