ReferrerCop 1.0.4 is now available. This release includes a minor bug fix and a new -U command-line option to check for updates to the default blacklist (which occur pretty frequently these days).
I'm still waiting for the rest of the world to discover ReferrerCop. I only know of a few people who use it, but it's probably the most useful piece of software I've ever written. I'm surprised there aren't ten other programs out there that do the same thing; instead, everyone seems to be misusing mod_rewrite and slowing down their web servers. Silly people.