I have the Blackberry Tour 9630. What most people don't know about the blackberry is that each blackberry is assigned a pin and an image. You can give someone your pin and they can message you using the pin instead of your number. Also, with the image, you can show your image to someone else's blackberry and the phone will take the image and add the contact to your phone. It's sweet!!! Check this out if you want to know more.....
http://www.blackberrytune.com/the-de...or-blackberry/