the overhauled sculpting mode is awesome:

http://www.blendernation.com/blender-sculpt-demo-45-million-polygons/

http://www.blender.org/development/release-logs/blender-250/sculpt-and-multiresolution/



and a video of the better bullet integration:

http://www.youtube.com/watch?v=iZ9dG9FeV4w

no need anymore for taking a detour to the game engine for physics baking...