As part of a hackathon at work, I developed this jQuery mobile prototype to demonstrate the possibility of such an app. (It's not a fully functioning app, but rather a demo that follows a script).
Personal Portfolio
This page was a grand exercise in itself. I built it using responsive techniques (try resizing your browser). A couple of the more enjoyable challenges building it were:
The transparent header, which is fixed, and getting it to work with the in-page navigation. To get the anchors to target the relevant section and not have it render below the fixed header, I set the top padding of the three sections to the same amount as the height of the header, then negated that space in the document by subtracting the same amount in the top margin for the sections.
The dialog you are now viewing, as well as the one for Concur Technologies, are jQuery UI dialogs. But the content is loaded from separate HTML pages retrieved with AJAX calls.