Sharing app-specific files and data between ios users
<p>I am writing an app that allows users to create and save (locally) various visual models.  A new requirement has come up to allow users to share their models.</p>

<p>Has anyone had an experience doing this and what is the best way of implementing this?  Ideally I would like to be able to attach a file or a link to an email/tweet and then send it off and then it opens the file in the app or if you don't have the app installed it send you to the app in the app store?</p>

<p><strong>Update:</strong>  The <a href="http://itunes.apple.com/us/app/mindjet-for-ipad/id440272860?mt=8" rel="nofollow">MindJet</a> iPad app does exactly what I need</p>
