Euclideon is unjustly taking credit for other people's hard work, proof (video is from 2009):
http://www.youtube.com/watch?v=HScYuRhgEJw
They might also be using other people's source code (legally though, it's released under the Apache license):
http://code.google.com/p/efficient-sparse-voxel-octrees/
And here's the whitepaper so you can build your own:
http://artis.imag.fr/Publications/2009/CNLE09/
Stop virally spreading this video, you're only helping Euclideon profit from more page views and attention