MOSS 2007 is great, it's customizable, extentible and there is a lot of functionality out of the box. But have you ever tried adding a word document from your application to a document library? Yep, there is no webservice in Moss that helps you uploading documents to a document library.
Therefore someone wrote a custom webservice (using the Sharepoint Object Model), which you can deploy on your Moss website to upload documents. You can find the webservice here http://www.codeplex.com/wsuploadservice/Release/ProjectReleases.aspx?ReleaseId=1343
- Wesley