Research in Motion is potentially in trouble as discounts it has been counting on for its smartphones are about to end, according to Kaufman Bros. analyst Shaw Wu. Citing checks, he claims Verizon's popular buy one, get one (BOGO) promo for the BlackBerry Curve 8330 should end on Saturday the 27th and that it will effectively boost the price of a BlackBerry Storm as a result. Although less expen