What makes a trip to a restaurant a great experience is not just the fact that they serve delicious food and good wine, but it has a lot to do with the atmosphere and overall 'vibe' of the place. Of course, a 'good vibe' means different things to different people (some like it chilled and some like it loud and bustling), so imagine how cool it would be to be able to browse through dining options based on the exact atmosphere you're looking for. That's what Hoppit is all about; finding restaurants by atmosphere. Hoppit's API provides access to this handy functionality.
Careful what photos you tweet--and where you were when you snapped the shot. There's another site designed to warn you against the hazards of over-sharing. This time it's not related to active location-sharing, but instead accidental. The meta-data stored in your photos may be giving away where you live.