Thought still far from completion, rev-0.7 keeps growing. This is basically the current status, where you can see that many important subsystems are running, and that some developer tools have been added or improved from older versions:
-Multi-platform support:Being able to compile your projects both for wii and windows allows you to use a lot of powerful tools to debug your code and inspect your game's internals. This makes a faster, more comfortable and more reliable development process.
-Log system:A good log system is always a good friend.
-Improved time system:Allows for precise and safe timing, which will help creating better physics, profiling and more.
-Memory:Memory management is being redisgned to help debugging pointer bugs and avoid some crashes like trying to delete a block more than once, warning you when that happens so you can track the problem and fix it.
-Script system: lua based script system that will allow faster and more flexible development for your games.
-Model loading: RMD models can now be loaded into the engine and rendered correctly. RMD format is fast to load and optimized for Revolution Engine.
-Camera: Cameras are working on this version also. This is a basic featured that has been present in all versions of the engine but one that will see many improvements in the near future.
And that's most of it right now, as always you can checkout the SVN for a more precise look into the engine.