Stock availability at Sales order entry

It would be a cool feature for sales to have an indication if an item you item is or will be available or not right at the sales order entry. The system would check if there are expected existing POs, Inventory, etc to see if stock will ever exist to fill this order.

For instance, if a sales guy starts entering in a sales order blindly it would be cool for the system to give a slight indicator that this item is currently not available or is not expected to be available based on current stock level and PO. This is more for a mental reminder really for the person entering to sales to remember to dispatch purchase orders when needed.