Full disclosure: I'm not a fan of Instagram. I see very little value in low-resolution photos with minimal filters posted to an "exclusive" social network, when anyone can do the same with a smartphone and a free editor. That said, I'm glad to see the millions of Android users who were patiently waiting to get into Instagram finally have their patience rewarded. But one group of people isn't so thrilled to see Instagram's potential userbase grow by a couple hundred million: iPhone and other iOS users. And they've taken to Twitter en masse to whine about it. Aww, bless their poor little hipster hearts.