This is what a lot of us non-developers think of when we think cloud computing: versions of stuff like Office that run we know not where, but work wherever we are.

Microsoft release.

Arrington: "For most users this will be more than enough to make the expensive, downloaded version irrelevant. Power users who need advanced features will still buy Office, but that's a tiny percentage of the overall market."

Mary Jo says details of the offering are still a little, um, cloudy.