Over the last couple of days I've been getting hammered by trackback spam. My spam count, via Spam Karma, as gone from 400 to 1,500. If you are getting the same problem then you should consider downloading
Spam Karma, none of the spam has hit my blog and the only reason I know about it is because Spam Karma keeps a count of it. Sounds like
Scoble's got the same problem too.