Ask Slashdot: Low-Cost Tools To Track Employees' Web Use?

First time accepted submitter red-nz writes "I come from New Zealand where new anti-piracy laws have come into effect that prosecute the owner of the internet connection for copyright violations. This is now a major issue for businesses, as they of course don't want to be liable for employee infringements. We have some good firewalls that are capable of doing basic filtering by 'category,' e.g. P2P sites, etc., but ideally would love to find a low-cost or even better Open Source alternative to expensive reporting tools (such as WebMarshal or Websense) that is capable of reporting on individual employees' usage with friendly reports (i.e. dont just show the URLs of the 3000 items their browser requested that day). It may be too much to ask but if the software could also show how long they spent on each site, it would be fantastic. Anyone got any winners out there they can share?"