Here is a online community for teachers. I searched by topic and they had some good discussions about curriculum and one about using RSS for current event assignments.
I am really excited about this one because our school is looking at starting an AP Human Geography program next year and this site looks like it could extremely helpful.
I know this is one of the recommended sites on this weeks post, but I actually found this on my own while working on another class. It really does look like a jackpot.