I e-mailed rlk, about when he wanted to do some work on it, but he never got back to me
I gave him the source code, but that was for a slightly older build. It runs great now I have made some improvements to the scheduling (running neverball as a thread rather than interrupt driven). However, I will not be releasing Neverball, and it is up to rlk if, and when that ever happens. Any source code release for Neverball and Neverputt is also completely down to rlk.
I have been looking over the 1.5 source code and for future reference, and I can convert it to OpenGLES just as easily as the first version, so at least it is future proof in terms of mobile devices.
I just guess rlk has got a lot on his plate with the move and all ...