iPhone style viewport scrolling

How would one make the viewport scrollable with the touch features?

Just like any app for the iPhone.

There is currently a Plugin being developed by another user to allow us to do this. He says its really close to being published.. But I guess it's possible without it if your up for a challenge

Check the how do I FAQ to the section "Scrolling/Camera".

There are a few examples of how to manage the scrolling.

Most of them use the keyboard or the mouse though, but it should be easy replacing those inputs with the touch plugin.

In the same list there are a few examples of how to use the touch plugin (in the "Touch" section).

This and the manual entry on the Touch plugin should help you.