So you want to be an Office Developer? Read this...
...or perhaps you already are (or need to be)... Microsoft just posted a new downloadable document entitled Office 2003 Document: Overview of Developer Technologies that really looks deeply at all the solution options involving MS Office.
As per MSFT's site:
“This overview of developer technologies describes the newer tools and technologies that help enable solution developers to build custom solutions incorporating programs from Microsoft® Office 2003 Editions. The goal of this document is to allow developers who incorporate Office 2003 Editions within custom solutions to begin to understand the new development technologies and techniques around Office 2003 Editions and the types of solutions they can create with them.”