Straight-forward Print Quota System for *nix?

saihung writes: "I pitched a Linux-based file and print queue server to a department at a local university, and they accepted with one caveat: that I also implement print quotas and accounting. The accounting isn't really a big deal, but I've looked high and low and found nothing even approaching comprehensive quota support. Does anyone know of a print quota system for *nix that doesn't amount to "here's a few perl scripts that don't work"?" There are several printing systems under development, but I don't have any idea which would be the easiest to implement a print quota system. Anyone?