View invoice on website

Is it possible to view the contents of the invoice within the website itself (similar to the way quotes are viewed)? It would be nice if my customers could view there items without having to open another window. The quotes look great on the front-end and I would like to have the option to view the invoices the same way.

The only reason that I could see it necessary to open a new window and display a "print view" of the invoice is if it is going to be printed out. Otherwise, I think it looks better (and functions better) being able to see it in the context of the website.

Am I missing something, or is this not possible?