One of the best side benefits of running this blog is the stimulating exchanges I get to have with very smart and insightful people via mail. This week's mailbag has been a shining example and I'd just like to send a generalized 'thank you' to the people who've taken time and sent me their observations, critiques, thoughts and suchlike recently. You know who you are and I'm very grateful for the chance to exchange with so many bright minds.