According to Arbitron/Edison Media Research, the share of at-work Internet radio listeners is up from 12% to 20% as reported by Steve Smith at minonline. 30% of college students students are listening to Internet radio. That’s an amazing statistic and explains why services  like Pandora,  CBS’ Last.fm and Slacker have been growing rapidly lately. Radio executives are obviously taking note. Steve quotes Larry Rosen at Arbitron/Edison saying “For a growing number of people, obviously those in front of the computer, the Internet is simply a better solution for ‘radio’ listening than a traditional AM/FM radio.”