This isn’t a sure thing, but this sounds very promising to me. The iPhone has been in need of a kickass IM client since its launch, and Apple already has the framework. Not only do they have iChat on OS X, but their SMS interface is well regarded. It seems like a very logical step.
Do you have any thoughts on the subject? Are you in need of a better IM client? Let us know by commenting on this post or hitting me up on Twitter.