You'll need Ogre 0.15 from now on.
Or CVS ogre :D
Current CVS version still has some minor graphical glitches from resource loading that hasn't been ported to the new structure yet, but these will be fixed soon. Afterwards there'll be the long-promised 0.2.2 release with the 3D demo world.
Its missing skybox.material in CVS I think, can you commit it please?