Development efforts on Blender 2.5 have been renewed with work on the Data API through RNA. This allows for automation of GUI building, and provides a solid basis for animatable properties throughout the database.
Brecht has done a great job in designing and implementing the RNA system, and works is being delegated in RNA-ifying our DNA (the very core of the Blender database and file format). I’ve started wrapping the Material and Nodetree datablocks in RNA.
As always, I’ll be doing regular screencasts of the progress of Blender 2.5 (if there’s anything visibly added or changed). I’ve created two today. Watch them and enjoy.