Interest has increased dramatically as the Web has evolved over the last 12 months. Many sites are now into their second or third iteration, and they re looking to add valuable, licensed content. But this is only the beginning. The smaller sites will follow. There's only one thing that could become a major limitation to how far developers can go with Web radio components.
Web radio can only be as good or as bad as the folks programming and delivering it.
Otherwise, the greatest limitation relates to bandwidth. And that is quickly becoming less of a problem.