In preparation for the launch of the PSP Go, Sony this morning launched several accessories headlined by a receiver that works beyond the company's own handheld. The Bluetooth Stereo Headset Receiver will turn any 3.5mm headphones or headset into a wireless set. While designed with the PSP Go in mind, it can pair with as many as eight devices and fits standard Bluetooth profiles: it can be used for basic calling on a cellphone but will also relay stereo audio over A2DP for devices like the iPhone or iPod touch and has a set of playback controls for those devices tha