UPDATE: iPhone Upgrade, 7digital + Songbird, NuTsie, imeem

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  Apple announced an upgrade to the iPhone OS including several music related. (PC)
• MP3 download store 7digital has announced a new partnership with open-source music player Songbird that integrates its 6 million MP3 catalog into the player's library of tunes. (TechRadar)
• Melodeo goes mobile with its nuTsie music streaming application using Google's Android OS.
• Country giant Keith Urban is releasing some tracks first exclusively on imeem.