The claim that Apple would be interested in investing in Twitter, from a New York Times report, was countered by the WSJ which claim that this information is out-dated from one year although the two companies, Apple and Twitter, remain good partners. Proof of this partnership is: Twitter integration within iOS 5. However a Twitter integration within iTunes would make sense.
Last June, we learned that Apple will kick-off Ping, its social network dedicated to music, when the next version of iTunes will be released to the public later this year. During an interview with AllThingD, Tim Cool, CEO of Apple, said that Ping will soon be phased out but that new features related to social networks would be added to Apple products, such as Facebook in 6 iOS and Mac OS X Mountain Lion .
Given the proven disinterest that the public have for Apple's Ping, it is not surprising that Apple decide to remove this feature preferring to use/integrate new social networks function within iTunes like Twitter or Facebook one. When it was first released to Public, Ping had attracted the interest of nearly one million users but over time, the number of active users has severly drop to a very small number.