With the release of , Apple has added a significant new feature to their Messages app with the introduction of iMessage.

Seamlessly integrating into the existing Messages application, iMessage is a new service from Apple that acts as a replacement for the traditional text message service that comes with mobile phones.

In actual fact, a more accurate description of the Messages app with iMessage on iOS 5 would be that it improves on the traditional text messaging service whilst maintaining compatibility with it.

The new iMessage service works by associating a person with an Apple ID – rather than a particular device or SIM card as the traditional text message service does.

This is one of iMessage’s advantages, you are not restricted to a single device and you can now use your or iPod touch (and hopefully Mac soon) for receiving and sending messages to other people.

See the article here:
iOS 5: iMessage