For all you Apple TV users out there, Apple's now released firmware version 2.3. The patch, downloadable through the media hub's built in updater, now lets users stream music from AirTunes to any speakers connected to an Airport Express or other Apple TVs in the house. You'll also get the ability to use third-party remotes, and make playlists that include a mixture of audio and video formats. [Apple Insider]
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I've been using my Logitech Harmony remote with mine since I got it. I thought third party remotes were already supported.