In an attempt to counter the success of Google's online office applications, Microsoft has just launched the beta of its new Office Live Workspace. The service allows users to share, collaborate and comment on Microsoft Office documents such as Word, Excel and PowerPoint files. However, unlike Google's service, Microsoft requires that users own a copy of Microsoft Office in order to use the service, and users who wish to make changes will have to open their copy of Office and then upload any alterations once complete. The service is compatible with both Office 2003 and 2007 - if you want to take a look you can sign up for free by visiting the Office Live website. Microsoft has also renamed the current Office Live service to Office Live Small Business.