There are several companies offering transactional importing in QuickBooks:
- http://www.qbalance.com/Import_transactions_into_QuickBooks.htm
- http://www.zed-systems.com/products/axis.aspx
- http://www.baystateconsulting.com/products/01TxnWizard.htm
I have not used any of these - so do your due diligence.