An Internet radio station program discovery service is provided. A plurality of Internet radio station programs is obtained. For each Internet radio station program of the plurality of Internet radio station programs, the Internet radio station program is dynamically categorized by mapping a dynamically identified topic of the Internet radio station program to a content classifier. A User is enabled to discover an Internet radio station program of interest from the plurality of Internet radio station programs based on the dynamic categorizations for the plurality of Internet radio station programs.