The title says it all, we just have released an update to the PDF Spam Agent.
There entire PDF spam recognizer engine was rewritten to deal with the new types of PDF spam and it detects most of them pretty well. We did not add rules for some less widespread/older PDF spam types that are unexpected to be repeated in the future, but still there are 8 new types of PDF spam that are caught by the agent.
We have also changed the source code license to LGPL 3, so now the gates are open for admins with programming skills and programmers with admin skills and programmers without admin skills and just for everyone to improve the agent. I think the code is quite well documented and reasonably organized considering the limited time we had, but if you have any questions, feel free to ask.