Is possible to create reports with more advanced information. A example is SARG (http://sarg.sourceforge.net/), this product provide various informations from SQUID logs.
Exists a product similar to Sun Java Web Proxy ?
I know you can setup the proxy server to log access data in many different formats.
Maybe you can get the format to match squids format so SARG can be used.
I looked at this for a brief moment some time ago and for some reason did not proceed.
Try reviewing this doc to see if it makes sense.
Please report your finding back to the forum. I am interested to see if it pans out.