Thanks very much for bringing vozMe to Joomla. It works very nicely. I made one modification to the XML and PHP script which allows me to change the button color and css attributes within the button.
Right now , 2c has the button set to white with black text. I added a css field to the XML setup file for mdoifying the style and changed my personal settings for it to orange for the button and whiteto the text. Since this feature is most useful for visually impaired people, a button that stands out is going to be optimal. I also added a CSS vozMe.button:hover rule so it changes when the mouse is atop of it.

One major request I have is the ability to put all of the js and php code onto the joomla hosted site rather than on the vozMe server. This way the entire system is self contained on one server and doesn't have a dependency of the vozMe.com site being accessible.