I had an email about this this morning. It's a browser based sculpting application based on stephaneginier.com/sculptgl/SculptGL
(or a direct copy, I can't really see much difference).
I only first heard of SculptGL about a month ago when I was browsing the Sculptris forum. There was talk there about people trying to fork it so I guess this may be part of that.
Still can't get them to work for me though. I don't exactly know what WebGL is but I know I can't do it.
*stays with Sculptris and Olde Blender*