Nerval's Lobster writes: Twitter is plunging into the online music game. Twitter Music (or “Twitter #music,” in the company’s own rendering) uses Twitter activity such as Tweets and engagement “to detect and surface the most popular tracks and emerging artists,” according to an April 18 posting on Twitter’s official blog. Songs on the app derive from three sources: iTunes, Spotify, or Rdio. And yes, Twitter is big, but its victory is by no means assured: other IT giants have entered the same market only to watch highly-publicized projects wither away, doomed by some combination of audience apathy and implementation issues. Take Apple’s Ping, for example: launched in September 2010 as part of an iTunes update, the ambitious social-networking and music-recommendation engine immediately ran into a number of problems, including a lack of Facebook integration (despite Steve Jobs’ assurances to the contrary) and widespread reports of spam and fake accounts. Can Twitter's effort stand out, or will it just be lost in all the noise?