For all you hardcore 3D Shooters 'out there' who like to get 'down and dirty' with rough technology and are keen to get your hands on (almost daily) beta versions of Mother3D technology then pop along to Vulcan's Hybrid website
http://www.vulcan.co.uk/hybrid
Once armed with their digital distribution tool (The Vulcan Portal) you can download the technology testing demo and start sending those huge bug reports and feedback emails to the chap who's creating Hybrid