Anthony Howe has upgraded his milters to work with Postfix 2.3 and its new Sendmail 8 milter support. This means that Postfix can now filter based on SURBL hits using milter-link:
http://www.snertsoft.com/sendmail/milter-link/
In addition he reports: "Also in this update, milter-link/0.3 has been updated to support aggregate list bit masks and added a new option policy-links."
Jeff C.