I did a search on the boards and did not find any topics concerning Targetware. Anybody who is involved with improvements to RB3D has probably already checked it out, but if not, it should provide some interest. Targetware is a community developed flight sim engine currently in open beta, and it includes the Targetware:Flanders project.
The ultimate goal is to have a main, massive, paid subscription based arena. This will contain all of the "normal" planes/matchups/settings/scenarios. However, everything in the game can be modded, and private, free servers can be hosted by people who want to do their own thing.
It seems as though the Flanders project is progressing at a slower rate than either the Rabaul or Korea projects, so if anybody here knows of people that work on RB3D, they may want to pass it along.
www.targetware.net