Follow this thread:
http://www.energeticforum.com/renewable-energy/20239-magnet-motor-revelation-1.html

And UFO has it almost done:

https://www.youtube.com/watch?v=FaIttbSld5o

It's all in the magnet selection, placement, alignment, the "Y" shaped ramps and the shielding.  Get it right and not only will you have a self runner, but a device that will accelerate towards self destruction.

Cool any more luck with this yet? I like the ramp idea and how you adjust it.

http://www.americanantigravity.com/files/documents/Paul-Murad-SEG-Replication.pdf

This looks pretty interesting but I think they over complicated it vastly. Its the "Searl Effect" Or the SEG Searl Effect Generator.