[jarin]

These are fiction, but they're really enjoyable futurist sci-fi. The first one is about the singularity, and the second one is a really unique and interesting take on artificial intelligence.

http://www.antipope.org/charlie/blog-static/fiction/accelera...

http://lifeartificial.com

[tjradcliffe]

My novel "Darwin's Theorem", which is about stories, evolution, religion and science, is available for free: http://tjradcliffe.com/darwins_theorem/darwins_theorem.epub

It's character-driven pure speculation on big ideas.