well, not exactly a 'new' version of fremantle, rather a "improved formula" like coke classic after they failed with their new stuff. Ideally neither user nor app will detect any difference between N900 and Neo900 fremantle. New kernel may or may not happen, maybe even optional. Right atm the kernel guys try to get 3.5(?) running on N900. As long as the API stays compatible, I don't care too much about ABI compatibility, since in the end of the day it's a new hw platform anyway. However for the blobs like powervr 3D drivers we need compatibility.