Ugh. I tried to order one but couldn't get past the 'enter desired serial number' page due to a Javascript bug.

I hope it doesn't take another 2 years of research to find the forumula for a correct implementation of a Javascript event handler.

After sampling a few serial numbers, the cheapest ones cost 1000 euros. Serial #2 is a mere 100,900 euros.

Why are they so expensive?

Creative interpretation of supply and demand

homepage: http://www.gomboc.eu/gomboc_english.html paper: http://www.szt.bme.hu/Munkatrs/domokos/cikk_archiv/100/final...

The site says there are an infinite number of shapes with these properties. Anyone know if there are any that look dramatically different from theirs?

quantify different and I'm sure they can find it

How about scaling each shape to the unit volume, and then rotating to maximize the overlap. What's not overlapping is the shape delta.

With a different number of surfaces, for example?

Surface as defined by a non-differentiable border, sure. Topological differences could be easy to quantify. Extra points for knots and non-orientable surfaces (e.g. a klein bottle).

And this is different from a Weeble how, exactly? I'm going to guess it's of uniform density, unlike a Weeble, but the article completely misses that point. Maybe the author was never a child?

"It doesn't have a hidden counterweight inside that helps it perform this trick"

only a matter of time before you can just CAD your own.