I've only just found out about UT just a few days ago and now have v5.3 running on my home network. Not just 4-5 minutes after getting all of the racks setup - was I looking for squid. I run several CentOS machines and have Squid running in a few test networks right now. Amazingly easy to setup - and can see the benefits almost immediately. Hopefully - an optional RACK can be utilized in such a fashion that users wouldn't have to put in entries into their browsers, IE, Firefox, etc for a specific proxy server address. Having it transparent in the background would ease everyone's installation and likelihood of adaptation. I remember the old days in a large network with Novell's Border Mangler ...errr Border Manager....and setting up proxy addresses gets old after the first 2 machines.
TIA