Android: We had barely finished handing out invites for Aviate when Yahoo bought the company behind the intelligent home screen that adapts to your habits. Now it's back, sans the invite requirement, for Android phones.
The launcher replacement keeps your agenda handy, notifies you of meetings and appointments, sorts your apps by most commonly used, and even provides quick links to the people you contact the most. The more you use the service, the more it's customised to your habits.
The update is currently rolling out, so if you install it from the Play Store and it doesn't immediately let you log in, check back later.