My most recent writings can be found on LessWrong. I wrote there rather than here mostly due to the LW/reddit codebase’s superior support for comments and the ready supply of comments/commenters (at least historically – it has been dying).
Perhaps the best article I’ve written in a while is The Brain as a Universal Learning Machine, but The Unfriendly Superintelligence next door isn’t bad either.
Enter the Singularity 