PUBLIC MARKS with tags voyages & "social networking"

Dopplr is an online service for intelligent business travellers. Dopplr 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.

the social network for travelers, by travelers. At Driftr, you are the travel writer, photographer, and reviewer. Keep track of your travels, share your trip photos, reviews, and blogs with friends and family, as well as research destinations before you book a trip