Appadvice.com has noted that Apple has approved a 3rd-party app which supports AirPlay. The app is called StreamToMe and requires iOS 4.3, which has not yet been released to the public although beta versions have been released to developers.
This suggests that iOS 4.3 may be getting close to release to the general public, but more importantly it signals that Apple is opening the door for other applications to use AirPlay.
If you're not familiar with AirPlay, Richard Gaywood wrote a brief intro to AirPlay back in September.
[via