On March 18th, PlayStation Portable owners will be prompted to update their firmware to v3.93, which expands support for PLAYSTATION Network titles.
At this time, users of the PSP Internet Radio feature will find 20 new internet radio players to enjoy. The new players are organized into more specific styles of music so that PSP users can easily find what they are looking for and listen to their favorite genres.
A step=by-step setup guide for PSP'FREE internet radio feature is available
here.