Starwood Hotels & Resorts is implementing a new pilot program that will see two key hotel locations in Manhattan and Silicon Valley allowing guests to enter their rooms with their smartphones, reports The Wall Street Journal. After installing the Starwood Preferred Guest (SGP) App, guests will receive a virtual key on their iPhone, which can then be used to unlock a door with a tap using Bluetooth 4.0. The newer Bluetooth specification, first introduced with the iPhone 4s, has been used in a similar way for many home locking products like the Lockitron and the
