Vinge is a computer scientist so the whole thing reads very well from a hacker's perspective. Also it won the Hugo & Locus awards in 2007. Am a big fan.
Wikipedia Entry: http://en.wikipedia.org/wiki/Rainbows_End
Buy it: http://www.amazon.com/Rainbows-End-Vernor-Vinge/dp/081253636...
Back to the AR subject, I much prefer AR over true matrix style VR. Let us stay in the real world, move about the real world, extend it with the virtual.
[1] http://www.amazon.com/Rainbows-End-Vernor-Vinge/dp/081253636... [2] http://www.amazon.com/A-Deepness-Sky-Zones-Thought/dp/081253...
[Edit: Grammar]