Slacker Mobile

Finally! The folks at Slacker have gotten it together and released Slacker Mobile (Free) for the iPhone as well as all Blackberry devices. Buffering remains minimal as the app looks almost identical to the PC version. The Blackberry version offers station caching, an exclusive feature that guarentees playback anywhere while increasing your battery life. Not to be outdone, the iPhone version allows you to create and save your own custom stations.