i'm watching this:
http://www.bbsdocumentary.com/
and i keep thinking how much of it seems similar to the matrix presented in sr1 to sr3 (and to some degree still is there with sr4, tho with the RTH and LTG layers not being talked about its less noticable).
Consider something like fidonet:
https://secure.wikimedia.org/wikipedia/en/wiki/FidoNet
a organized group of bbs's passing messages and stuff between them. In a way it reminds me of how the denver nexus and the various shadowlands where organized.