Have you heard about Texty?

Have you heard about Texty! It makes editing commonly used text content a breeze. By using a process called simple content management syndication - SCMS, all you have to do is create your block of text, called a texty, and save it. Then you cut and paste the code for your texty into your web pages. When you want to modify them, just log in to Texty and edit, and your changes are automatically applied to every web page that has that texty on it. Make one texty, or make several. The choice is yours.
You 've have to try it out for yourself to believe it.

texty.com