I just upgraded this blog to MovableType 2.661 in the hopes of defending against comment spambot attacks. So far I’ve mostly gotten only a handful at a time, but it’s clear that there are much larger spam attacks underway against MT sites.
The upgrade was pretty painless — just copy over the newer files and add the configuration file entry to specify a number of seconds before a posting IP address can post again. Yecch, spammers are rotten scum who steal from us all for their own profit. Perhaps Mr. Gates will have some impact.

Related posts:
I just increased the time required between postings.