The last time we spoke with Stephen DeWitt, the head of HP's webOS global business unit was on the defensive about the TouchPad. In spite of -- or perhaps because of -- the anticipation of the device, the first webOS tablet received a lukewarm reception at hands of reviewers. DeWitt vigorously defended the slate against the critics, suggesting that technology writers had been approaching the product the wrong way. A lot has happened since that conversation, of course, including reports of unmoved stock and, more significantly,