Finally Microsoft have released Office 365 for iPad, now you can download Word, Excel and PowerPoint for your iPad from the App Store. With an Office 365 subscription the apps are fully functional allowing you edit or create documents. Without an Office 365 subscription you can only read your Word documents, view your Excel data and present with PowerPoint. The apps integrate with OneDrive (SkyDrive) and OneDrive for Business (SkyDrive Pro) providing almost anywhere access to your data.
The existing Office Mobile app for your iPhone is now free on the App Store