If you haven't yet read Ray Ozzie's essay on Extreme Mobility, you should. In his usually fashion its well written and well thought out. Ray starts off recalling a recent conversation with the CIO of a company with over 1000 employees who's stopped buying laptops. I reported last month that laptop sales had outpace desktop sales for the first time in May. Ray has some thoughtful analysis of what mobility means in various contexts defining "usage mobility," "Infrastructure mobility," and "participant mobility."