"potential new and different architectural approach" to solve the Comcast - L3 dispute

Since it is Friday, maybe some of peering experts have some time to speculate what this new approach proposed by Comcast might be, as they assert it would represent "a significant shift of Internet infrastructure." http://www.lightreading.com/document.asp?doc_id=202121 http://blog.comcast.com/2010/12/comcast-continues-discussions-with-level-3--... Well, their previous proposal was already representing quite a significant shift, and not in a good way, but I wonder what the new offer could be so that they figured it would be more acceptable to Level 3. I hope due to the speculative nature of the question it will not be considered off-topic. -Lorand Jakab