“WhatsApp is now delivering an eye-popping 1 billion messages a day on six different platforms, which it claims puts ahead of any other independent messaging apps.”

I for what it’s worth, I tried Textie, Facebook Messages, HeyTell, Beejive IM & WhatsApp. WhatsApp was the only one that has stuck.

Here’s an interesting use case; my group of friends use it for group messaging while playing Battlefield 3 multiplayer on the PS3. It’s way faster than messaging over the Playstation Network.

Source: GigaOM