From the Dopplr website:
Dopplr is a service for smart international travellers. Dopplr members share personal and business travel plans privately with their networks, and exchange tips on places to stay, eat and explore in cities around the world.
Since Nokia bought Dopplr it's been dead in the water. I'm looking for something that offers similar features to keep track of where I've been, distance travelled, etc. And also maybe Yelp-like features that recommends places to visit.