Twitter gets telephony

IP phone service provider Jajah has introduced a Twitter-based telephone option. Now in beta, Jajah@call will let Jajah users with Twitter accounts make free phone calls to other Twitter subscribers.
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Jajah to provide Yahoo! Messenger's VoIP service

Yahoo! has selected Jajah to deliver a VoIP service that will enable its 97 million customers to make "high-quality, low-cost" PC-to-phone and phone-to-PC voice calls to more than 200 countries using Yahoo! Messenger.