A bit more background on Office Web Applications :
… We already told you Microsoft Office will be extended to the browser. There has been a lot of excitement about this new service, but Sarah from on10 found there’s also quite a bit of misinformation around it. Therefore she decided to create a special Q&A, to answer some of those burning questions people have about the new web applications. …
… For the full list please read Sarah’s Q&A. Besides Sarah’s Q&A there’s also a FAQ about Office Live Workspace available at the Office Live Workspace website. If you are not familiar with Workspace you can read this to orientate. It doesn’t tell much about the web apps, besides that they are lightweight apps and to sign up for Office Live Workspace if you wish to get more information and updates about any beta product availability. …
Source: Microsoft Office Web Applications: Your Burning Questions Answered
