For those of you users out there who are running Google Chrome beta, there is a beta extension in existence called Chrome Office Viewer that will actually let you open Microsoft Office documents in Chrome. Currently this is a read only extension but hopefully soon it will be a full blown read/write add-in. It has the potential to be a big plug-in. It is also important to note that when opening documents in chrome, it opens it up in a sandbox mode. Essentially separating it from everything else to prevent infections if the file is malicious. Pretty cool if you ask me.