Enjoyed your blog. I just finished another Ray Kurzweil book titled "The Singularity is Near". I found it to be fascinating, although I don't know if I am convinced that we are evolving/progressing at an exponential, rather than linear rate. Kurzweil devotes a good portion of his book explaining why he believes that we are in fact on an exponential curve. I generally felt that there were too many supporting points that are open to interpretation. I think that an exponential rate is a possibility, but not a probable one. Anyone else have any insight or remarks on Kurzweil's exponential theory?