BBM-like iPhone app?

I keep hearing all this hoopla about BBM (Blackberry Messenger) and I want in on the fun. Is there anything similar to BBM out there for the iPhone? I heard WhatsApp was something like it, but just wondering if there were any others.

Kik Messenger is relatively new and has the best feature from BBM (IMO);

Sent, Delivery, Read and typing status for messages

Unfortunately it was pulled from Blackberry's App World and actually blocked from pushing data on the Blackberry due to the fact that the founder was once an intern on the RIM BBM team. RIM is actually in the process of suing Kik - which just goes to show you that they are onto something.

Even without proper support on Blackberry, it's highly recommended for iPhone, and there is an Android version as well.

WhatsApp and PingChat are the major games in town. I've also heard a bit about Cnectd

Nothing has really sold me yet, as I'm looking for proper delivery and read notification a la BBM.

Now if someone could figure out how to cross the impossible chasm to somehow connect into the BBM network, it would be a game changer.

iMessage (Free on iOS5)

iMessage has now come to iOS5.

This can send messages to iPhone, iPad, and iPod touch, as long as they are connected to either a Wi-Fi or 3G network.

LiveProfile recently launched and is clearly GUNNING for BBM. Even closer in look, feek and functionality than Kik.

Even the fonts are similar:

BBM-like iPhone app?

They say their Blackberry App will be out soon, but I'd be surprised if RIM doesn't give them a hard time. iPhone and Android versions are currently available.