Mine: thetombricker
Wife's: distouristblog
Ironically, my wife's is filled with much better photos. In fairness, she has an iPhone 4 and I have a 3gs.
A lot of "real" photographers hate Instagram, but I love it. It stylizes a typically poor quality to make it more visually engaging. It can be a bit cliche, but I see it as harmless. "Real" photographers are way too uptight about a lot...