There’s good news for Internet radio sites such as Pandora. A group of webcasters have reached an agreement with SoundExchange, the organization that collects royalties for musicians and record companies, over royalty payments for playing music online. The dispute has been going on for two and a half years and has threatened to silence the Internet radio business. The fear of expensive royalty bills has even caused some people who started online radio stations as a hobby to quit.Now, thanks to the settlement,