Had a conversation with my colleague about integrating SharePoint 2007 with another system. So I talk about Business Data Catalog (BDC) in MOSS 2007. Simple to create solution to read from external system, but writing back is not so straight forward. In SharePoint 2010, there is this new Business Connectivity Services(BCS) build upon BDC enhances the SharePoint platform’s capabilities in integration of external data and services. It should be able to create a solution to read and write back to the external system easier. Will read more about it next time.
Reference: MSDN Magazine