Microsoft just today made the beta of its Office Web Apps online service available to select users and we got access to it and took a look around. It's by no means feature-complete and there are actually many bugs that prevent it from being used in a production fashion right now. However, the concept of being able to edit and create Office documents anywhere from the world from the Web app interface is an incredible powerful and flexible thing to have. The Web apps are limited in functionality, but they will be perfect for quick jobs while on the go.