Streaming radio services from America Online and Yahoo dominated the market for Internet radio in October, according to a new study. Arbitron Inc. (ARB) and ComScore Media Metrix reported 4.1 million people listened to Internet radio during an average week during the month. Yahoo's (YHOO) LAUNCHcast service garnered 1.9 million, or 46 percent; AOL's (TWX) Radio Network had 1.8 million listeners, or 44%, and Microsoft's (MSFT) MSN Radio and WindowsMedia.com serviced 424,700 people, equal to 4 percent. The three are the charter subscribers to the ratings service.
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