Finsrud's Perpetuum Mobile is cool, but not perpetual. The motion is very efficient but driven by magnetic fields, which costed quite some energy to create in the first place.
I once thought of putting a magnet in a coil in space. Give the magnet a swing and it would rotate forever. Free electricity!
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=98875 I did not go through Finsrud's Perpetuum Mobile
However if you need to create a magnetic field only at the beginning then it would be a perpetuum mobile ,regardless of the initial cost of energy
It is also possible both in theory and in practice to create a permanent magnetic field using super conductors
If you use the magnetic field to generate a current then the current itself shall induce in the super conductor a counter electromagnetic force which quench the magnetic field
The magnetic field is permanent as long as it does not supply energy
