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And to keep things on the hardware side of things -- since it's a developer conference, OS X 10.8 "Mountain Lion" is also expected to feature heavily during the week. We have mobile covered and it's likely the desktop will hold a prominent position during the meet.
Let's have a spin through what could be coming during the week.
iMessage on the iPhone, iPad, and iPod touch allows you to send free unlimited messages to other iOS devices. Apple will expand this functionality to the desktop, allowing you to keep your contacts and devices in sync wherever you go. You can send a message from your iPhone and see the reply on your account-linked Mac or iPad.
Notifications will keep you in the loop on things you need to know and when, including software updates, birthdays and who wants to get in contact with you. It will likely include a "do not disturb" feature to prevent important meetings from being interrupted.