Cups keeps a log off all files printed (PreserveJobHistory On) by default which is viewable throught the cups web interface. You will probably need to configure the web interface so it is accessable to you local network. Uncommenting and modifying a few lines in the cupsd.conf file did the trick for me.
Just looking at it, "View Completed Jobs" through the web interface isnt particularly pritty, espically if a single job has a long name, like a webpage printout from IE