All commercial versions of the productivity suite include it free of charge.
InterviewBut won't say whether there will be a desktop version of Office Online to replace Office 2010 Starter.
Improved filtering means fewer emails get through the new, advanced spam filters in Microsoft's Clutter for Office 365.
Clutter looks at how you read your email and tries to make your life easier by filing the messages you don't need to see.
Any institutions that have bought Office for faculty and staff can now offer it for free to students with a full suite of products available.