It features a galaxy wide group of alien civilizations that communicate by means of a system that greatly resembles Usenet newsgroups.
It either won or was nominated for most of the major science fiction awards.
I've been looking for books with similar ideas for a long time... would you (or anyone else) know any? The ideas in the two books are really amazing.
Neal Stephenson's Snow Crash and The Diamond Age.
Greg Bear's Moving Mars, Anvil of Stars, and Eon.
John Barnes' A Million Open Doors, and Mother of Storms.