9to5mac.com is claiming that there is hidden support for Bluetooth in the second-generation Apple TV. A YouTube video and code is presented as evidence. As the site points out, Bluetooth support is not currently active within the Apple TV operating system (iOS), but Apple's next major operating system, iOS 5, will turn on Bluetooth.
Apple is thought to be positioning this Bluetooth support mainly for keyboards, but the site muses that perhaps a Bluetooth-enabled Apple TV will be able to connect to Bluetooth iPads, iPhones, and iPod Touch devices.
"App support was rumored for inclusion in this second generation Apple TV, and perhaps Bluetooth accessory and keyboard support is a sign of apps still coming to the television through Apple's device," says the writer, Mark Gurnan. "Additionally, the Apple TV - a competitor to the Google TV - could benefit from more built-in apps like the Safari web browser. Perhaps with this new Bluetooth support, and already existing WiFi support, Apple is putting together a web browser for the Apple TV."