San Diego-based personalized Internet radio service Slacker announced yesterday that it has linked with The Source Magazine, to launch an online, Hip-Hop radio station. Slacker said it would power The Source Digital Radio, a hip-hop station linked with The Source's print magazine and online web site. Financial details of the deal were not disclosed. Slacker said the radio station will be featured on TheSource's web site, as well as as in a spotlight section on its mobile application. Slacker is venture backed by Austin Ventures, Centennial Ventures, Mission Ventures, Rho Ventures, and Sevin Rosen Funds.