The last version of EulumdatTools using Ganymede is wat I created yesterday. If you need an editor and verifier for large sets of Eulumdat photometric data files, you can download it from here.
With the upcoming release of Galileo, future versions of EulumdatTools RCP application will be based on that.
What shall I tackle first to use and learn new features? Mac OSX Cocoa support, the small eraser in the search field, or maybe something deep inside: OSGI declarative services.