From Entrepreneur.com: "According to a 2004 study by media research firms Arbitron Inc. and Edison Media Research, Internet radio has an estimated weekly audience of nearly 19 million Americans and growing. Not only are people listening in online, they're also buying online.

"Monthly Internet broadcast (radio and video) users might represent only 26% of the online audience, but they accounted for an estimated 42% of online spending. Advertisers can reach an audience that's in listening and shopping mode...

"Here are a few tips based on audience demographics and behaviors:

"Test a new offer... Launching a new product through Internet radio could give your initial sales a boost. You'll also likely receive immediate customer feedback or testimonials...

"Appeal to a 'hip' audience. Although the age range of broadcast users is 12 to 54 years old, the highest concentration of users falls into the 12- to 34-year-old group. They are a technologically savvy group in tune with DVDs, cell phones, messaging, video games and other media products...

"Use a URL in your ad. 42% of the Internet radio audience has listened in while shopping or researching a product or service online, so invite them to your website...

"Wondering where to start with Internet radio? According to AccuStream iMedia Research, the top five Internet radio sites in May 2004 were: Shoutcast, Net Radio Sales Network, AOL Radio Network, LaunchCast powered by Yahoo! and Chaincast/Stream Audio.

"AccuStream iMedia Research, which provides data and analysis on streaming media and on-demand broadcasting, noted that while AOL users already pay a monthly subscription fee and can therefore access the network's radio programs, a majority of Internet radio stations are free. This was a major factor in the solid growth of the listening audience across the major players from March to May 2004, and a growing consumer audience is a compelling reason for advertisers to investigate their opportunities."

Read this Entrepreneur.com article online here.