August 19 - 12:00pm EDT   A report today from The NPD Group reveals that 2008's spring quarter saw cellular phone sales in the US drop to 28 million units, or 13 percent less than the same time period in 2007. Revenue from the sales for the same time period, at below $2.4 billion, represented a two percent decrease, the NPD report concluded. Accounting for the discrepancy between these numbers is the fact consumers are spending 14 percent more in the spring quarter of 2008, $84 on average, on phones that have more features, with sales of QWERTY keyboard-equipped handsets jumping by a record of 28 percent, while handsets with Bluetooth jumped 12 percent. [full story]