This is the initial release of a plugin that creates a set of pages like the WordPress.com Hot Topics pages. It's a lot more simplistic, but by feeding posts into one blog it also creates a sitewide feed of all posts plus feeds of any tags and categories too.
FeedWordPress is an Atom/RSS aggregator for the WordPress weblog software. It syndicates content from feeds that you choose into your WordPress webblog; if you syndicate several feeds then you can use WordPress's posts database and templating engine as the back-end of an aggregation ("planet") website.
What LoudBlog is:
LoudBlog is a sleek and easy-to-use Content Management System (CMS) for publishing media content on the web. It automatically generates a skinnable website and an RSS-Feed for Podcasting. Just upload your audio/video files, add some notes and links, and you’re done!