From sourceforge the project has more the 700 downloads.
I have made two demo page:
1) mobile phone: http://apachemobilefilter.nogoogle.it
2) pc browser: http://apachemobilefilter.nogoogle.it/php_test.php
in the second page you have a form where you can force User Agent
Below I have illustrated the architecure of my project:
For more details about the module: http://www.idelfuschini.it/it/apache-mobile-filter-v2x.html