When I started this blog in 2001 I had comments turned on and received very little spam, but of course, that didn't last. Even trackback entries were spam, so I turned it all off. It looks like the folks at TypePad have put effort into dealing with that issue, but I'm not ready to turn comments back on yet.
For now, if you have something to say, then say it via Twitter/Tweetboard. You can use the Tweetboard on the left side of the page. Just click the "tweets" tab and figure it out. If you can't make it over that low barrier, then chances are I don't need to know what you had to say anyway. Also, you get to say what you want, without me having any control.