After reading this thread from the beginning to the end, and working with my own analysis using logic and isolation. By method of elimination I have concluded my research with the following results.
Everyone has the same issue "network communications - crashes the Xbox". And I have been experiencing the same phenomena. We need to isolate which part of network portion is broken? TCP/IP stack, bios or dashboard? Is it part of the new copy protection circumvents? Who, what, where, when, and how is this going to be resolved? Simply following a method and coming to a definite conclusion is the only direction a logic answer will follow..