We told you about BeepUs last week and since then the app has taken off. BeepUs simply allows you to carry on Push to Talk style voice chats over BBM. It uses the new BBM SDK to get it running and makes it a real breeze to chat with friends. From what I gather Tuk pulled their BeepUs app from App World late last week but they have since returned it along with updating it to v1.0.2.
This update brings bug fixes along with other updates like instructions and UI improvements. You can pick up BeepUs free in App World.