I just published a new article. This month, I do a short introduction to the Open XML SDK that let you fill a Word document from a .Net application without having to use automation. This is very useful to automate a process running on a server.
You can read it from http://www.emoreau.com/Entries/Articles/2011/03/Using-OpenXML-to-fill-a-Word-document-from-a-Net-application.aspx.