Ok, so it looks like we have some initial interest. Here's what I'm thinking at the moment:
I've taught Algebra I, Geometry, Algebra II, Precalculus, and Calculus. So I am fairly certain that I can create the curricula for those subjects and everything would be taught year-round, not following the agrarian calendar. I would take 6-9 months to do Algebra (not splitting into two), 6 months to do Geometry (proof-based, start from points, lines, parallel postulate, and end before power chord theorems), 6-9 months to do Precalc (trig, polar, polynomials, end behaviors and basic limit work, with parametric and conics as optional), and 9-12 months to do Calculus (limits, derivatives, integrals, volumes, and basic multi-variables). I can fill out the rest of the topics later.
What I think I need is the curricula and pedagogy that would take you from basic computations to pre-algebra (which I refuse to believe needs to take 6 years as most educational systems do it) and the topics and curricula for post-calculus. I also need a number of good books about the history of mathematics, the puzzles that we have struggled with over the years and their solutions, and the current unanswered questions.
Websites, books, and such would be great, but as I think about this more, it would facilitate the process more if I can have volunteers to compile/organize/be responsible for a specific area. So for example, someone could volunteer to compile a series of the best damn interesting books about the history and development of math (this is where my expertise is most lacking), or someone could volunteer to spearhead the unanswered questions or current hot topics.
I hope that makes sense.