That's it. I'm thinking that I might want to make it a bit more simplistic, but I think that this is a good start.
UPDATE (24/06/2012): Here's the second version:
UPDATE (25/06/2012): Here's the third version:
UPDATE (28/06/2012): Here's the fourth (and greatly changed) version:
UPDATE (02/07/2012): Here's the fifth version, which looks a lot more like the third version:
UPDATE (11/07/2012): Here's the sixth version: