If you click through any of these links: https://twitter.com/#!/search/instagr.am https://twitter.com/#!/search/instagr.am You'll be taken to a rich web experi

If you click through any of these links: https://twitter.com/#!/search/instagr.am https://twitter.com/#!/search/instagr.am You'll be taken to a rich web experience that allows even non-iPhone users to engage and in turn share with friends via Twitter. So Instagram has done both the web and iPhone really well which has been enough for them.