Very popular streaming radio app Slacker Radio has just received a notable update to a completely new user interface. The new UI follows a stark blue and white contrasting design, with some holo-esque features to it such as use of the overflow menu button and clean transitions. Other than that, the new app is generally pretty simple and unique in its design. You still follow a simple design of a homescreen with search and four options -- genres, my music, specialty stations and news/talk/sports -- with the rest of the UI being just lists of stations when you dive deeper.
This is a big step forward in design for Slacker, and it seems to perform as well as it looks. Not to mention that v4.0 slots it right in with the styling of its web interface, which is important. You can grab a free download of the app at the Play Store link above.