At Pixable we are creating a widget that shows the best photos of any topic or event. We do this by collecting photos from Instagram and Twitter combined with geotagging, hashtags, and ranking algorithms based on user relevancy, retweets and favorites. Several brands have already shown interests in using the widget. Have a look at this example with the best photos of the Space Shuttle flying over NYC today:
And if you want to see it full screen, check it out here.