I have a voice recognition module for sale. The pictures below are of the actual module for sale, I didn't take them from anywhere else. It doesn't include the installation bracket, I just velcro'd it on top of my Nav unit bracket and it's very secure. All the information you need about the module is in the X5 World article.
http://www.xoutpost.com/showarticle-10.html

Owner's Manual. http://www.bmwmotorsports.org/pdf/BM...%20Control.pdf

$200 shipped