We have a lot of international orders that require pre-payment by wire transfer before we ship.  We need to enter the sales order into the system to track, and the sales orders get updated with notes multiple times before it is shipped.  I would like to be able to put a hold on these sales orders, similar to the payment hold that comes up with credit cards that are declined in order to keep orders from being shipped before they are paid.  Does anyone have any ideas on how to do this?  Maybe a workflow?  Putting the account on hold