Have you check their Wiki and Documentation web site? Their blog is worth the check also.
Blog I haven't dig into ShiVa (actually any other engine yet), I even don't have time to test the A8 beta.
Sometime ago I tested the Linux webplayer. The Linux is Ubuntu 32-bit, running as Virtualbox guest in my Vista 64-bit host. I am surprise the webplayer is able to run in virtual environment, althouth the frame rate is not high.
