The wildly popular social networking site MySpace has gone wireless via a pact with Helio, while Facebook, a rival site, has done the same through deals with Cingular Wireless, Sprint Nextel Corp. and Verizon Wireless. Although the features of both services are mostly limited to text messages at this point, their potential to generate revenue for the carriers may be huge, as young people tend to be heavy users of SMS, picture messaging and ring-tone downloads.

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