There's already a few unofficial AirPlay
applications out there, but looks like developer James Laird has now gotten right to the heart of the matter and enabled a whole host of new streaming possibilities. Here's apparently managed to crack the private key used by Apple in the AirPort Express
(literally by ripping one open and dumping the ROM), and he's used that to build an emulator dubbed "ShairPort," which will let you stream music from iTunes to any third-party software -- or hardware, for that matter, if someone decided to go as far as to build a device that takes advantage of the private key. Have something in mind? You can download the emulator at the source link below.