OT: Using iPad to show/sell proof images

While the iPad has been great for showing my portfolio and to a lesser extent, preview images from the camera on a larger screen, the real opportunity I see is to be able to show clients a selection of images and create an order right in an app.

Has anyone found an app (or know of one in the works) that can synch up a folder of selected images and then allow order information to be collected from the images while you are showing the photos to a client? Trying to avoid using a paper order form with the iPad -- defeats the purpose of an great interface and viewing experience.

Thanks!

-Mike