Sean, at Preposterous Universe, says:

I’ve written a Cosmology Primer meant to explain the basic features of the universe to people on the street. It’s very much in rough draft form at present, but has nevertheless gone live. I’d be very interested in what people think — not about stylistic questions, since the look and feel will undoubtedly evolve, but whether the level is appropriate, and if the important questions are addressed, and if so if the answers make sense. Let me know.