I’ve started doing some bloggy-style posts at LessWrong, a site that’s somewhere between a discussion forum and a blog, and which you should be reading in any case. I just put up a post titled “Two kinds of irrationality and how to avoid one of them,” and previously did a post titled “Tell LessWrong about your charitable donations.”
In the future, I’ll tend to post anything I judge to be especially LW-suitable (i.e. dealing especially with rationality or AI) over there, and just link to it from here. However, feel free to use the comments on this post to discuss either link.