Hey, I forgot! The Caryatids by Bruce Sterling! Awesomely fleshed out world where there is still some super-high tech but also some nasty global warming scenarios.
The only problem is I found it to be more like 3 or 4 novels in 1, instead of actually 1 novel. It follows the story of 3 sisters, and if you are prepared to get 3 snapshots of the world of 2064 from very different perspectives and economies, and can cope with the novel jarringly moving from one sister to the other cloned 'twin' sister, then you might be able to enjoy Caryatids.
I also loved the Pheonix Legacy which is more of a Space Opera involving the interactions between some feuding Houses (which reminds me a little of Dune) but covers a long backstory of a post-nuclear world.
The great twist in the backstory? Civilisation starts in Australia, with us downunder types coming to rule the world! It's well worth it. Sweeping space opera, conflict, with post-apocalyptic history developing as a backstory.
Awesome! I thoroughly enjoyed this!
ChrisW's "Phoenix Legacy" page
Last but not least, you MUST read the AMTRAK WARS!
The Amtrak Wars - Wikipedia, the free encyclopedia
It is set 1000 years after the holocaust, with the brave Amtrak Federation the last hope for civilisation in their burrowed tunnels and warrens and underground lifestyle. Their wagon-trains fight the terrible mutants on the surface, with old Indian warrior classes and names of power like "V8" and "Mega-byte". Some are even rumoured to have psychic powers. The Amtrack Federation is set to wage war with the mutants on the surface,
but is everything as it seems?