Simply put, I want to enter informaiton in a word (or excel) document, press
save (or a button) and have the information update an excel (or word table).
I would say it is almost the exact opposite of mail merge.

I know have created something in the past (a long time ago) that mimicked
this functionality - but I cannot remember how I did it. And if I did it
over 5 years ago, it couldnt have been that difficult.