I have moved over to Typepad, as my MT installation was getting broken, complicated and onerous to fix.
It means I have lost the design temporarily that Tom coded for me, but I’ll try and edge back towards that as time and Typepad’s training-wheels allow.
Comments should work again now, although I’m a little wary of the lack of comment-spam control that Typepad has, and the reports of deeply unpleasant amounts of deeply unpleasant comment-spam that friends have gotten, so we’ll see how we go.
The RSS feed for this site is now http://blackbeltjones.typepad.com/work/index.rdf
Sorry for the inconvenience and thank you for reading.
Petafloptimism 
I, too, use TypePad and have had some bad comment-spam experience recently. And then, in the last couple of days, this has all dwindled to nothing (or just about nothing). I then saw this post (dated 21 May) on Everything TypePad! (http://www.typepad.com/resources/2004/05/typepad_vs_comm.html):
“Recently we added some simple tests that eliminate a large amount of comment spam on TypePad blogs. According to our logs, most spammers try to cover their tracks by sending their posts through an “Open Proxy Server”. An Open Proxy Server is a misconfigured or infected machine that forwards web requests for anyone on the entire Internet. The spammers use these proxies to avoid the one commment-per-minute restriction and the Blog Owner’s IP address blocking.
So, we started blocking Open Proxies — all 1.5 million of them. It immediately reduced the comment spam problem. In fact on our first day it blocked over 20,000 spam attempts!”
This seems likely to be the reason why my comment-spam has fallen away so dramatically.
I’ve had the same experience – comment spam has dwindled to nothing lately.