"I've now re-enabled them, but I've added a programming question that hopefully should be easy to answer for anyone wishing to comment, but too hard for the spammers to be worthwhile to figure out."
http://weblog.ikvm.net/CommentView.aspx?guid=cd9f8602-a7c9-4a90-b307-5850b2039020
I am so sorry that I can't answer the easy Java question... :(