You walk in to your favorite restaurant in the city. You pull out your phone to brag to your friends, and possibly see that someone you know is there, too. So, what do you do? Check in to Foursquare, Google Places, Facebook Places, Yelp, or one of the many other check-in options?
Sonar, a new geo-location notification aggregate, can now do better – telling you which of your Foursquare, Twitter, Facebook and LinkedIn friends are there – and tweet them directly to let them now you’ve arrived. This all-in-one functionality is terrific obviously, but relies on all of your contacts actually utilizing one of these services to check in themselves.
And how many people are going to check in via LinkedIn? Well, perhaps a business conference, I suppose?
It’s an example of an awesome possibility that will only become awesome once these services start auto-checking you into places – which admittedly, is uber-creepy.