For the last few months there's been a lot of talk on the net about the Web 2.0 Address Book -– a technology that knows where you are and what you are doing.
It's also sure to be a hot topic at the Web 2.0 Summit, the annual web services conference taking place in San Francisco this week.
Yet to be invented, the Web 2.0 Address Book would be a unified contact list linking everyone you know across all of the social networks you belong to. It would link all your computers and devices, and know where you are at any given time.
So, rather than somebody calling you or sending you an e-mail, your friend would just browse their list and click on your name.
Wherever you are, the communication reaches you via the most convenient and appropriate means. If you're walking on the beach, your iPhone rings. If you're at your desk, you get an e-mail. If you're in Tokyo, you're probably asleep, so you get a voicemail.
