Far from being lukewarm, Instacolor takes the best bits of Instagram and combines them with the location-specific guidelines of the unpopular Color, helping you find other photo-sharers in your proximity, in real time. Out now, it costs $1. [iTunes via TechCrunch]
This is similar to an idea I had before. Combine something like Craigslist with Google Maps. You can go on there and see what people are selling locally by seeing little blips on the map around where you live. If they choose not to give a specific address, they can just put in a zip code.