When I upgraded to WordPress 2, I turned on the Akismet plugin. The description of the plugin is to the point: “Akismet checks your comments against the Akismet web serivce to see if they look like spam or not.”
I haven’t had to moderate a spam comment since I enabled it.
One warning- I’ve heard that Akismet does have a tendency to occasionally flag regular commenters as spammers until you kick it several times…
Orion
Comment by Orion — 6/13/2007 @ 3:58 am