Yesterday we externalized a Beta version of the brand-new "Oracle Application Server Developer's Guide for Microsoft Office Interoperability", which includes sample code demos. Here's the official description:
This guide describes how to enable interoperability between the Microsoft Office suite of products and the Oracle Application Server set of components. This includes a description of the Microsoft Office-centric architecture, the Microsoft Office Extensibility technologies, the Oracle Application Server components that can interoperate, and many step-by-step procedures that describe how to build Microsoft Office interoperability solutions.
This guide will almost certainly be invaluable for Oracle shops running Office apps as their front ends (and how many tens of thousands are there of them?).
Download the guide, sample code, and other technical resources re: Oracle + Microsoft interoperability here.