We have a cart up and running at [url removed, login to view] - it's on a custom PHP MVC framework.
This project is to get a receipt built into the confirmation page.
After you pay there is a confirmation page that says:
There exists an order detail page already because it gets emailed to the customer, and it can be viewed in the administrator panel.
We want the success page to show a receipt so they see exactly what they bought, and exactly what they paid, and a link to the My Account page so if there is a problem they can cancel their order.
I *THINK* you'll be able to re-use the ajax library that shows you the order detail in the back end, and just stick it in the success page - more or less..