If you see this post it means that BlogSvc 0.8 has been installed and setup on your server. You can modify/delete all the existing posts on your site using Windows Live Writer. It is also possible to modify the About and Blogroll information through Live Writer.
Setup Live Writer
Download the latest version of Live Writer and add your new weblog account. You can edit, delete, and create new posts with Live Writer. See our Live Writer guide for a tutorial.
More Information
You can find more information on AtomServer at the official website. Here you'll find the latest news and documentation. The ongoing development of AtomServer can be followed at CodePlex where new builds are published and the source code is available.