Go check it out at JD2718. It contains my recent update on the textbook-free modern algebra course and a large, and I mean large, assortment of other math-related posts. Some of these are about math teaching, some are about math research, and some are just cool. One combination of all of these types of posts is this one from Fields Medal-winning mathematician Terry Tao.
And I have to believe that being in the same blog post as Terry, AND listed just after a post at the most excellent geek blog-comic xkcd.com, my math coolness quotient must have gone up a few notches.
The next carnival is in 13 days at Good Math, Bad Math.