After a six month testing program, PaperCut Software have released their final version of PaperCut NG for Mac OS X Server. The Mac version has all the functionally of the popular Windows edition including, print quota, print monitoring, shared accounts, release station and rule based filtering of print jobs. The system works by hooking into CUPS. More information is available here.
The developers also recently presented at the Mac Managers meeting at the University of Utah and the presentation is available online in PDF and QuickTime format.