I continue to see more Instagram-based apps and services emerge on Product Hunt so I put together a collection of them. Check it out. My favorite (and most ridiculous) has to be Boomf.
This is nice! I've been playing with various apps/services for visual curation and have tried to achieve similar things with Instagram, alas to little success so far. Hope this is the answer...
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Bug report (when we get a maker on here): I picked 'England' from the country list (not 'United Kingdom'?) and then didn't see any cities in the list where I could pick London from when it asked me if I wanted to be featured. Not that I have been that active lately: http://instagram.com/jschuur
Product Hunt
Closed Club
Viral Loops
PTO Genius
Enki