Steve's Balls and other things :)
This one is tiny, another NVIDIA T&L rules the world demo.
ttp://www.demonews.com/files/3ddemos/dnvidiademospheremark.asp
More of the same kind of thing recently mentioned at RivaZone, http://www.rivazone.com/, notable mentions include bump mapping demos using Dot3, coupld other bump mapping demos etc.