It's much better to assume that it can be done
 

Soooo cool

Researchers in the Netherlands have successfully levitated water droplets, hazelnuts, frogs and even a hamster named Tisha. In theory, it should even be possible to levitate humans, although no one has actually done so yet.


<img src=http://i.timeinc.net/popsci/images/science/sci0204maglev_A.jpg>


more here
http://www.popsci.com/popsci/science...577754,00.html

I like the closing text (paraphrased): remember why it can't be done, then go ahead and do it :)