Research in Motion’s Jim Balsillie’s currently in Dubai, gassing about how amazing the latest update to BlackBerry 7 OS will be — probably between trips to the beach. When it arrives, those crackberries equipped with NFC (Bold 9900 / 9930 and Curve 9350 / 9360 / 9370) will get BlackBerry Tag. You’ll be able to tap two phones together to share contact details, multimedia content or add new friends to your BBM. RIM is planning to open up the relevant APIs so developers can use the facility in any number of interesting ways, like bringing touch-to-share to the system. Considering the speed constraints of NFC, it’s difficult to believe that big files like images could be carried by the technology — it’s more likely that NFC will pair the devices and then send your files down a larger pipe, like Bluetooth. There’s an enigmatic press release after the break, and hopefully the company will explain how this works in a little more detail before the update arrives.