Dopplr is a social network service that lets you share your future travel plans privately with friends and colleagues. The service then highlights coincidence, for example, telling you that three people you know will be in Paris when you will be there too. You can use Dopplr on your personal computer and mobile phone. It links with online calendars and social networks.
I use it to let other people know about my travels and emebed information from the Dopplr database on my wesbite.
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