Presence and availability: Coming to a mobile phone near you

Instant Messaging Planet – While instant messaging on PCs has remained mired in proprietary disputes, it looks as if truly interoperable IM is headed for mobile devices this year. And that will mean that mobile device users will soon become intimately acquainted with the concept of "presence" - which indicates at any given moment whether they are available to accept messages or phone calls. Find out how this revolution will change the way you communicate.

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