Not upgrading the shopping experience risks customer defections to the likes of Target and Costco.

FORBES

As that becomes clear, the customer defections will accelerate more, as the last holdouts adjust.

ECONOMIST: America��s postal service will begin to undo itself

Not a huge proportion but enough to set investors--concerned about customer defections and the little telecom's ability to collect on WorldCom receivables--on edge.

FORBES: Your Big Best Friend--Or Not

Customer defections have been slowly eroding BlackBerry's commanding market share and fueling an investor unease that has pushed RIM shares down around 25% so far this year.

WSJ: BlackBerry Maker Hopes New Tools Lure Customers From iPhone, Other Rivals