I’m often asked about the differences in Office 2003 and 2007 compatibility with SharePoint. There’s an extremely detailed document on Microsoft’s site that explains it in ‘Good, Better, Best’ terms. You can find the article entitled Microsoft SharePoint Products and Technologies Document: Microsoft Office Programs and SharePoint Products and Technologies Integration – Fair, Good, Better, Best at:
It even covers Office 200 and XP to some degree.
(I never can rememeber where it is, so this is as much a memo to me as anything else!)