A simple synopsis from SSS:
"For over a hundred thousand years, the evolved human brain has held a privileged place in the expanse of cognition. Within this century, science may move humanity beyond its boundary of intelligence. This possibility, the singularity, may be a critical event in history, and deserves thoughtful consideration."
1. First, the actual '93 white paper by Vernor Vinge wherein he lays out the idea.
2. The Stanford Singularity Summit (SSS) where top writers, journalists, and hackers gather to discuss the idea.
3. An interview with Cory Doctorow (amazing author of Down and Out In The Magic Kingdom) at the conference.
4. "Nano Comes to Clifford Falls" a great short story / audio podcast featured on EscapePod arguing the pros and cons of the idea (with great commentary by Steve Eley)
5. The Transhumanist Manifesto (reformated into a FAQ) published on the 'World Transhumanist Association' website.
6. And of course, for full-disclosure, a collection of articles that are highly skeptical of the idea.