Philosophy Blogs?

Was visiting some friends visiting in San Francisco last night. Catching up on each other’s doings, we naturally got into a discussion of blogs (almost derailed by jokes about how funny the words sound). One, an old philosophy buddy from my undergraduate years (he’s now a professor at Ohio State) said something like “I’m pretty sure I’ll never have a blog.” I told him that I believe that there were already some philosophy blogs (or at least theology), and discussed how one might promote oneself through a blog, much as one would attend conferences, write papers, or function as a source for journalists.
So I promised to send him some links to philosophy blogs. Is there a good hub for such? If Wittgenstein were here today, would he be making his Tractatus notes online?