My client needs to show "Sold Out" below a product on the category listing page and also show it on the product detail page.
I believe at this point the item will still be allowed to be added to the order and it will show "back ordered" on the checkout page and the invoice.
I think the client also wants a message on the checkout page saying - "backordered products will not be charged to your card until they are shipped".
I will also need a backorder report in the Admin section so my client can see what customers have backorders and for what products. Maybe OSC has this ability already.
I will verify final details with my client before you start the project.