HP caught the industry by surprise yesterday, announcing some serious executive reshuffling, with Stephen DeWitt, the company's former head of Personal Systems Group Americas stepping up to fill in the lead role at HP's webOS global business unit, while Jon Rubinstein will be in charge of PSG globally. This game of executive musical chairs raised a lot of questions with regards to the state of the company's beloved but arguably underperforming mobile operating system, particularly in the wake of the TouchPad's lukewarm reception amongst reviewers,