What I understood is that when a site goes from public beta to production that it gets a final design. This design is created in close discussion with the community. Maybe we could think ahead a bit and discuss in what direction the site design should take us.
For instance, we could go with a site that takes design hints from IT security, but I think that misses the point; we're not interested per se in achieving system security.
An obvious thing to include would be a key and padlock. But personally I think that doesn't highlight the mathematics that is involved.
As background we could maybe do something with mathematical formulas, describing some kind of probability or order calculation.
We probably need to put the XOR operator somewhere in the design.
Of course we could go with something that uses a modern type set on what basically looks like white noise. In that case we're already there :P
Or we could just wait for the process to start of course. I was thinking of setting up a set of requirements for the design, but I don't think designing a site should work that way, lets just look at possible directions or sketches.