I just finished reading Halting State during the week. Awesome read. But then I love technology, D&D and online gaming. Written in second person, it feels like you are playing the game, in the action, just like a D&D game - a brilliant extra layer. OK, a couple of times I had to check the chapter start to see who 'I' was again, but that was OK. You wouldn't want all novels like that though.
Favourite quote - "it's TCP/IP tunnelled over D&D". Excellent.
Technology used - I'm still sceptical of quantum computing, but I loved the glasses characters were reading which gave them an HUD of information networks. I want that, and can't see why it won't be here relatively soon.