A well written blog post, I just passed this onto a student who was doing a little analysis on that. And he in fact purchased me lunch because I discovered it for him.... :). So let me rephrase that: Thnx for the treat! But yeah Thanks for spending the time to discuss this, I feel strongly about it and love learning more on this topic. If possible, as you become expertise, would you mind updating your blog with more details? It is very helpful for me. Two thumb up for this share!