It's here! Microsoft Office is finally here! Well, sort of. Following a similar release on the iPhone several months ago, Microsoft has released the official Office for 365 app for Android, as promised. It's a companion application for their cloud-enabled Office subscription service, and in order to use it, you'll need to be an Office 365 subscriber - plans start at $60 a year for a single user.
Office 365 is only available for Android phones.