A research note released by a Pacific Crest analyst today reports that a “meaningful number” of carrier retailer locations sold zero BlackBerries last month. That the company continues to decline is not a surprise, but still…that’s as man units as I sold of my smartphone product. The report goes on to say that overall US sales have declined 80 percent in the last eight months, at which time sales were already depressed. [Source VentureBeat]