VirtueMart import system.
The system now includes a plugin called "System - Joomla Bookkeeping Virtuemart Import" which imports the a new sale into the accounting system.
This imports in the invoice that is created by VM, it will create items in the JBK invoice for every product it finds in the VM invoice, and will then create a contact using the data entered by the VM user.
It still needs a little work, as it doesn't import in the address, and telephone numbers, but they will be in the next version.
Please let us know if you find any bugs or issues.