One more for these scammers: today I got comments from friends of mine. At first they looked normal as they have commented on my blog in the past, but looking at text, it was pretty clear that it was spam. There is really no other way than checking all comments and trackbacks.
Such a pain.
By the way, TypePad now offers Catcha phrases to validate comments and I have turned these on. I have also turned moderation off to see if automated comment spam is still filtered out.
Update: this blog has been spam free for a few days but spammers have found their way to generate catcha responses, so I am putting moderation back on.