We are a business to business wholesaler on Netsuite about 5 years.  We have used various incentives to encourage our customers to order online but most of these customers have their own accounting systems.  It is just easier for them to print a purchase order and drop it in the fax machine or e-mail it.  Having to go online and enter these item into our website doubles their work.  My question is this.  Are their any APIs or other systems out there with the ability to link other accounting systems like Quickbooks, Peachtree, Sage, etc to Netsuite so the customer