Weather permitting, Alan is heading out to ApacheCon NA 2013 tomorrow. He will be giving a presentation on working with transparency in Apache Traffic Server (ATS). Alan implemented most of the transparency support in ATS, so he knows what he is talking about.
He's spent the past month verifying his memory and working up a master setup script for transparent Apache Traffic Server. You can access his slides and scripts at ATS setup on the Network Geographics web site.