I usually* don’t moderate comments but do review them and delete obvious spam. TypePad filters most of that (see below) before it reaches the blog but occasionally spam (seemingly human generated) gets through. They can seem valid, often reference the post they appear on, making it a marginal call. If your valid comment is removed by mistake let me know as I will be happy to repost it. Do that via the "Email me" link in the About section in the far right side bar.
* The main exception being when I'm travelling and not able to connect to review what is being posted.