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iMessage is useful, but also confusing. You can send text messages from it, but also send iMessages to your iPhone or iPad owning friends. Even iPod touch users are in on the fun. Apple could go one step further and unify the application into a native instant messenger client. Throw in open protocol instant messenger services, such as Windows Live Messenger, Facebook, and AIM, to name the three most popular, and Apple could have an application that rivals most other multi-protocol instant messengers on the App Store.
Image credit: ZDNet.