Someday your PC will be able to tell minute-by-minute how others should communicate with you, based on where you are, what you're doing and who's trying to make contact. But for now, it would still be nice if you changed your instant messaging status when you go to lunch.

"It's not on anybody's priority list for the next two or three years," said Melanie Turek, an analyst for Nemertes Research. "You're talking about spending a fair amount of money and changing the way people work for something where the payback is kind of soft. Anytime you say, 'It's going to make people more productive,' CIOs start to roll their eyeballs. They want something you can measure."

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