Sending short voice messages over BBM is a fun idea. It may not be the most efficient way to communicate, but if it’s something that requires tone, sarcasm or any emotion, then text probably won’t do it justice. From the same developer that brought you the Viira GTD, you can send short voice messages over BBM with this free Beta app called VVM Messenger.
With VVM Messenger, you can send short voice messages up to 25 seconds in length to your BBM contacts for free. In a sense, this app is like PTT (push to talk) and could save you money when traveling. Check it out!