
A crazed computer industry billionaire and U.S. president form a partnership to transform the planet through sentient nanotechnology, but their plans are reversed by Chu, an autistic boy.
Rudy Rucker's Postsingular followed by Hylozoic are great books. It's a rather humorous view on postsingular way of life. It's hard to describe his books and Rucker's writing style is not everyone's cup of tea but William Gibson likes it.
Also if you haven't read anything from Michael Swanwick you should give his books a try. It's not strictly science fiction because he likes to slide into more psychedelic and surreal areas of fiction. But I consider that his charm. Start with The Iron Dragon's Daughter.
I also have to mention Cory Doctorow's Down and Out In the Magic Kingdom. I actually don't really like Doctorow's works. Some of them are boring. But this particular book is an exception and absolutely worth reading. A lot of interesting ideas are in play there including reputation based currency, eternal life (through ability to backup/restore body and memories) and extreme transhumanism.
Just like Postsingular made me wish someone would figure out how to strum the "lazy eight", Avatar left me wishing life on Earth came with an organic USB cable.
Sorry if there's a spoiler in there...