Thanks! The app was designed by @alexsailer and developed by me, @wlindner.
I've always wondered the same thing, and I think it's because all of the location data in the Instagram app comes from Foursquare. It would be really competitive with Foursquare if Instagram could search locations, so I don't think Foursquare will let them. That being said, all of this could change with Facebook places instead of Foursquare locations: http://www.fastcompany.com/3028166/instagram-testing-faceboo...
RE not using OAuth: I did that because users had a lot of trouble using the oauth login, so I basically just pass the users credentials to the oauth page. If you prefer oauth just press "Forgot Password" in the login popup and press the go back link, it will bring you to the standard Instagram login and will work the same.
that worked. I'd probably feel comfortable if there was just a disclaimer that said you don't store credentials on the login page. I'm probably too trusting but I like it when product designers are thoughtful enough to explain what is done with credentials/data.
I've always wondered the same thing, and I think it's because all of the location data in the Instagram app comes from Foursquare. It would be really competitive with Foursquare if Instagram could search locations, so I don't think Foursquare will let them. That being said, all of this could change with Facebook places instead of Foursquare locations: http://www.fastcompany.com/3028166/instagram-testing-faceboo...