The Higgins Project, namely Markus Sabadello, created an Information Card Selector that runs on the iPhone. Due to Apple's benevolent dictatorship which prevents extensions to the iPhone's webbrowser this selector uses a custom URL-scheme to launch the selector from a web page. Details can be found here.
I adapted the xmldap relying party to output the new URL-scheme when the user-agent contains "iPhone" or "iPod".
Here are some screenshots that Markus provided:
Integrating this into the openinfocard selector is a task for this evening.