What I can tell you right now is that Six is a website and geeks will love it. It draws on some new ideas, some that have been used before, and focuses them all for maximum impact.
KingCDR, GizzedInc's Chief Technologist and Developer has completed the R&D phase of development already and is currently working towards a base-functionality internal Alpha of the site for testing at least over the rest of the Summer and Autumn. We plan a Private, Invite-Only Beta, as well as a more public Applied-For Beta, likely to be held in Early- to Mid-2008.
I can say very little else at present, without spoiling the surprise for August 21st. It's going to be great. Trust me.