OK so I've knocked up a simple blacklist:
The source code behind it all is open.
Currently it is setup to import IPs which denyhosts has downloaded every hour, and it will also receive updates from several systems under my direct control.
If you wish to begin submitting your own reports you may get in touch, or read the documentation in the source repository. I'll document that on the site itself publically in a couple of days.
So far I see several people have rsync'd my zonefile a few times. I guess the domain name was a bit predictable.
ObFilm: The Great Muppet Caper