You could use PHP and a simple txt file.
Make a form on a password-protected page with the wanted fields.
On the process page, open the text file, append a new line that adds the wanted HTML (example: <p>), the content of the field (The news entered) and the ending HTML (example: </p>).
The txt file should look like this:
<p>NEWS1</p>
<p>NEWS2</p>
<p>NEWS3</p>
On the homepage, use prinf(); to print the txt file where you want in your HTML.
You could use more complicated stuff like eliminating the 1 line if the total number of line > 5, etc...