At the Billboard Music Entertainment Live event before CTIA, Microsoft was on hand to demo popular music apps that will be coming to Windows Phone 7 soon. CNET was able to get some hands-on time with the Slacker Radio, I Heart Radio, and MusixMatch apps.
CNET had this to say about the apps:
Each of the apps for Windows Phone is similar to its counterpart on other mobile platforms with a few unique exceptions and additions–Slacker Radio won’t launch with offline caching, for instance, but it will play on-device songs. What’s more striking is the interface of each app, which mirrors the Windows Phone 7 look and feel with its panoramic, side-swiping menus and vertical lists. These commonalities made the apps easy to use. The one exception was I Heart Radio, which doesn’t implement the side-sweeping menu navigation until you drill down a level.
Overall, they seemed impressed with the speedy performance and responsiveness from the unfinished apps, but noted some lag when trying to navigate from one app to the other. Some images of the apps are posted below.