These micro- and supermicro-size social networks aren’t competing directly with Facebook or even with one another. Conceivably, one could be active on all of them. But then we may bump up against a new neurological limit: the maximum number of social networks that the human brain can handle.
Just for perspective, Yahoo paid $35 million for Flickr.
Tripbirds.com

If you’re planning a holiday for the Easter long weekend, this one might be for you. Tripbirds is a Stockholm based startup that makes good use of the Foursquare, Facebook and Instagram APIs to not only give you an outline of trips you’ve taken in the past, but also to help you plan trips you’re going to make in the future.



