As Joseph mentioned earlier, I have a new blog up called You Do the Math focusing on ideas for teaching primary and secondary math. There's going to be a fair amount of cross-posting with this blog but I wanted a second outlet because:
1. I have a decade's worth of tips, exercises, lesson plans, test ideas, games, and puzzles for math teachers, much of which wouldn't be of much interest to most of the readers of this site.
2. I couldn't see the typical fifth grade teacher slogging through posts on the economics of health care and the potential for selection effects in polling and the rest of the analytic esoterica you'll find here.
3. I had some ideas I wanted to play around with. Since so many of the teaching posts aren't time sensitive, I'm using the scheduling function to keep a steady stream of content flowing. Many of the posts will be short and or recycled but I've already scheduled at least one a week for the next five months. When I get to six months I plan to go back to the beginning and start putting up a second post for each week. It will be interesting to so what the effect is on traffic, page rank, etc.
4. Pauline Kael talked about the way writing a regular column helped her discipline and organize her thinking about movies. I believe a blog can serve much the same function in other areas.
I've already got one up that talks about using codes to introduce numberlines and tables and another that shows how you can estimate pi by seeing how many times randomly selected points fall within a given radius and I have about two dozen more posts sitting in the queue. If this sort of thing sounds interesting to you, check it out and if you know of anyone who might have use for this, please pass it on.