You do not have to have it remote, not by any means. Seems a lot of people are looking for this very thing right now. Will it be text only, or photos also?
The updates will consist of text and photos.
it's really easy to either create a database which contains the TEXT and Image file.
But even easier would be to setup an text include
<!--#include file="update/update.txt" -->
and name your image something like
<img src="update/update.jpg">
set the client up with a FTP access to the update folder.
DaveN