Also stay in the loop with what's going on through these awesome links:
If you are processing the same invoice for multiple customers it would be nice to be able to set up a recurring "batch" of customers or to be able to simply add multiple customer names to one "invoice" and have the computer automatically generate the individual invoice numbers for each customer instead of you having to create a new invoice for each customer or creating a recurring plan you still have to create contracts for each specific customer - it would be nice to be able to invoice multiple customers at once if everything on the invoice was going to be the same!