[syslog-ng] Filtering duplicate messages

Hi, I've done a bit of searching on this mailing list and found some messages requesting a feature where duplicate messages are filtered/suppressed/summarised (I'm after the same thing). There appears to be a patch for syslog-ng 1.6.12 in openSUSE that addresses this for the older version. Is anyone actually working on this functionality for a 2.x release? I've got a proof of concept working on top of the latest 2.0.x git branch but before I get too carried away I wanted to check if anyone else is working on it (or if someone has already implemented it). Thanks, Chris