The service will be available via the Web at music.twitter.com and as an Apple ( AAPL) iOS app that can be downloaded through the App Store later today. The chatter on Main Street (a.k.a. Google, Yahoo! and other search sites) is always of interest to investors on Wall Street. Thus, each day, TheStreet compiles the stories that are trending on the Web, and highlights the news that could make stocks move.-- Written by Brittany Umar.