It appears Internet radio is more popular than ever, according to MeasureCast Inc. Contending that “the industry has plenty of room to grow,” MeasureCast CEO Randy Hill said there has been a 714-percent increase in the total time spent listening to stations measured by MeasureCast since January 2001. “Nevertheless, only 27 percent of the U.S. population, or 77 million people, has listened to a radio Webcast.” July MeasureCast numbers reveal 4.6 million people listened to Web radio stations, up from 4.3 million listeners recorded in June. Clear Channel Worldwide continues its run in the top Internet radio network spot. The company streamed a dozen more stations in July than in June. Virgin Radio once again ranked as the No. 1 Webcaster in the MeasureCast Internet radio stations ranking.