Alan Smith Quite correct. Paul Horwood's image on the left, and Jay Raney's on the right, if memory serves.
There is quite a bit more information out there, but nothing past 2003 as far as I know. Specifications, materials and anomalous effects can still be found here: http://www.rexresearch.com/hollingshead/hollingshead.htm
More on Hollingshead can also be found at the revived website American Antigravity:
And the podcast: