Multiple "Thank you" Pages
 

I would like to have multiple "Thank you" pages, chosen by the software based on the products in their shopping cart.

I ordered a book on Amazon and the Thank you Page has a nice "Share this on Facebook" option. I'd like that.
I realize that there is a nice "Share" button during the checkout process in Xcart, but I would like to avoid that as it can interrupt the checkout process.
The reason I want multiple pages is so the Share options can relate to the products that the customer purchased.
ANy ideas will be appreciated.