In Windows 7/Ultimate – somehow or another the right-click/new entry on the desktop no longer includes an entry for an Office Word 2007 document. How do I go about adding it back in?
You could try to follow the guidelines from Microsoft here: "How to add an Object to the New Object List". It involves editing the Registry, shouldn't be too hard, though.
I guess a safer way would be to just reinstall Office as it shouldn't delete any preferences but just restore everything.