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Instagram delights its more than 4.25 million users with photo-enhancing filters, tilt-shift, cool comments and "likes" features and instant social sharing options.
The once iPhone-only experience has spread to the web, Macs, iPads and even the physical world, thanks to a growing crop of developers. They're harvesting the massive amount of photos shared by Instagram users each second via the startup's three-month-old real-time API.
As many of our readers continue to point out, the only hole in Instagram's ecosystem is the lack of an application for Android users.