It's been asked before: why would Apple want to launch iRadio as a streaming music service when they have a huge business in the iTunes store for music downloads? The answer is straightforward -- the world keeps changing, and Apple has to keep pace or become outdated. Apple is looking for new ways to entice users and keep pace with a fast-changing music world, at a time when the growth of music downloads are slowing and streaming music services continue to grow.
The latest addition to licensing for Apple iRadio is Warner Music Group, who jumped on board this week. The big speculation right now is that Apple will drop the word on iRadio next week at its WWDC, or World Wide Developers Conference. This is where Apple traditionally announces its new software for the iPad and iPhone as well as other Apple products. Sony Music is still a holdout (as far as everyone knows) but could be announced over the next week to juice the PR for the WWDC.