On the last 2-3 weeks my blog has received a much higher number of Trackback spams (or Comment spam). Sampa uses a pretty good detection system for those and most of them don't even reach me, but some get through the system.
These Spams are different. They don't look like your typical viagra / casino / poker blog-spam. Most of the time they contain religious or spiritual titles. I think people are trying to increase their PageRank, but hey, that is stupid because we use "rel=nofollow" on our comment's links so that won't do anything for them.