This is also a question I have been pondering for a while. I have seen a plug in that can "push" information into quickbooks. It's called FMBooksConnector.
I don't really know how it works, but it's essentially linking QB Tables/ Fields with FM Tables/Fields. They work in a way were you can push and pull records either way.
I would suggest trying out the 30day free trail to get the hang of this.
Hope this helps