By way of Kottke, comes this excellent description of the CRISPR technology.
I enjoyed the book Change Agent by Daniel Suarez a lot.1 As with his other books, the basis for the fiction is solid. The futuristic technologies he invents have a firm foundation in actual science. Which is a far cry from a lot of science fiction I read.
This article by Derek Lowe is a pretty good overview of what is currently happening in the CRISPR field. It's probably not what you think.