One of the awesome new features on iOS 5 is iMessage, a service pegged as many as a text killer. A systemwide free IM program for all iOS users which syncs across all your devices. If you have any friends on iOS (and I bet there are a couple), you’ll never have to pay for a text message again — which has probably left the carriers apoplectic, as they make a huge amount on text messages. Even more interesting, it seems that they had no idea this was coming. John Gruber mentioned in a blog post:
A well-informed little birdie tells me that Apple’s phone carrier partners around the world found out about iMessages when we did: during today’s keynote.
Given the occasionally rocky relationship between Apple and its carriers, especially AT&T, I can’t imagine this went over well.