Digital Society covers network infrastructure, online security, and Apple hardware, including keyboard firmware hacks and broadband pricing.
HN links it for bandwidth estimates on iPhone 4 FaceTime and for posts on security and conspiracy theories; commenters give no opinion of the blog itself.
Weinstein doesn't link to any of the sources he is criticizing, perhaps out of a desire to avoid giving them any more underserved publicity than they already have. But rest assured, such conspiracy theories are out there:
http://www.digitalsociety.org/2010/05/speculation-could-googles-payload-data-be-a-broadband-map/
http://www.digitalsociety.org/2010/06/estimate-of-network-bandwidth-for-iphone-4-facetime/
The existing 3G network infrastructure wouldn't be able to take the beating.