Be advised that WordPress 2.9 MU is no longer a separate project from the main WordPress branch. It is continuing development as part of the main WordPress 3 branch under the name ‘multi-site’ or MS. This means that you can get all the benefits of both WordPress and WordPress MU versions by using the latest WordPress version. To help you in the process of creating a multi-user website with the latest WordPress version we have created a detailed step by step WordPress multi-site tutorial available here.
Your WordPress blog contains not only posts but also pages and post comments.
You can manage and organize your pages via your WordPress admin panel -> Pages Edit and Add new tab:
The comments left by your readers can be easily moderate via the Comments tab where you can approve, spam or delete the comments of your posts.
If you would like to start your WordPress MU Blog in a few clicks, check the WordPress MU Hosting package.