BerryTalk

Model:
Blackberry 95XX Storm Series (360*480):9500, 9510, 9520, 9530, 9550(Storm2), 9570(Storm3), 9800(Torch), Torch 2
Description:
Simulated Push-To-Talk (PTT) / Voicemail application. Allows you to quickly send voice messages back and forth between Blackberry devices. Messages use data and are free to send/recieve (subject to users data plan) to anywhere in the world.

OTA Download Link