Remittance Advice for Bills

I love the Bills feature, perfect for keeping track of payments to subcontractors. However, it would be good if you can press a button and send a remittance advice email for a bill you've just paid along with the date when the funds should arrive in their account.

It would also be good if I could link a bill to an invoice (just for tracking purposes) - ie invoice to client is for the same period as the subcontractor bill.