More an observation really.
After the latest firware update on my MBWE, I noticed that wireless laptops connected to my router were continuously receiving packets.
I traced this to the MBWE coming over port 1900 and received by a service within a svchost process. Quick research indicated that this was related to uPnP and I quickly discovered that the iTunes server was the culprit. Switching this off removes this behaviour.
Does this seem natural? Why doesn't twonkymedia exhibit the same properties?