http://www.kurthanson.com/archive/news/040204/index.aspAir America's VP/Marketing Leon Colaco told RAIN today that Franken's show yesterday — "broadcasting from an underground bunker 3,500 feet below Dick Cheney's bunker," Franken said — hit a peak of 45,000 concurrent listeners, which Colaco believes may be a record for a non-news event Internet radio webcast.
He added that the network's website handled nearly 500,000 unique visitors in the 22-hour period between 7PM Wednesday and 5PM Thursday, noting that all of these numbers were "unofficial," based on the network's own monitoring of live stats, and that final numbers from Air America streaming provider RealNetworks will not be available until next week.
Colaco said that he believed that Franken's audience was the largest number of simultaneous listeners that Real had handled since ABC News's coverage of the 9/11 attacks on September 12, 2001, which hit 86,700 concurrent listeners.
By recent comparison, the three top-rated channels in the most-recent Arbitron Webcast Ratings report were MusicMatch ArtistMatch, Virgin Radio U.K., and AOL "Top Country," which I would estimate have peak audiences of approximately 17,000, 6,000, and 5,000 concurrent listeners, respectively.
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Dunno when the Arbitron numbers come out, but webcasting numbers are more important than the local markets, IMO