the author of this app says:
Vlingo lets you control your mobile phone with the power of voice. With Vlingo, you can simply speak to your phone to send a text or email message, call a friend, search the mobile web, update your social status, and more. As the inventor of the mobile phone voice user interface, Vlingo is the only technology that allows you to open and use virtually any application on the phone simply by pressing a button and speaking to the phone.
BlackBerry Device Software Version 4.2.1 or higher.