content: Earlier today I looked at how to do them at home.  It's insne that nobody thought of this.  It's so simple.  The end effects are really simple and straight forward too.  I really hope they don't patent that. Even the spring is really simple.  Actually it's as simple as any could get.  It's printed on two conventional magnets that will attract but they print a few pixels in it.  It's just a matter of printing the same pattern on any two pieces.  If you make it a circularly symetric they will always repel and if you add any variation the pixel effect will fail when reoriented and the conventional magnet will take over.  This is why they always have to be on a track.  If you translated it even a tiny amount the thing would be as flat as a normal magnet. Almost all magnets are printed anyway.  If you look at a typical fridge magnet they alternate polarity for the same reason. Considering this is the third time I've seen them today the only thing that changed is someone started a marketing effort.  Something tells me Dustin is supported by more than just audible and there is a reason why they allowed multiple engineers to "just hang around" while dustin was there. If they try to patent we all need to be on the same side of this issue. Edit: I was about to say I would make one for anyone who wants one but they've priced themselves really cheap.  http://catalog.polymagnet.com/  Magnets are expensive in general.  As much as they over state how revolutionary they are these are a deal.