Hi there,
We recently launched http://sketchfab.com, a free service to publish 3D models online without plugin, using WebGL and HTML5.
We are looking for someone to code a plugin exporter to publish models directly from Zbrush to Sketchfab, using our API. We already have exporters for other softwares: http://blog.sketchfab.com/tag/exporters
If you are interested, let us know at [email protected], thanks!