tedster - 8:45 pm on Jun 3, 2008 (gmt 0)

Another tidbit shows up in the video from Webmaster Central's Maile Ohye:

Serve largely the same content per URL

She goes on to clarify that you can insert some dynamic portions into the page via IP detection, but you should "contain them or limit them to just small areas" of the total page. So there is no requirement from Google that the entire page will be exactly the same, no matter where the IP address for that request comes from.