On my employers blog I wrote a piece about a new feature of Hippo called pipelines that can be used to create new content channels. We have created an rss feed using the standard components of Hippo combined with the Rome project. If you are interested you can read the blog post here:

http://blog.dutchworks.nl/2011/12/13/embedding-rss-in-hippo-using-the-pipelines-feature/

Creating an rss feed using the latest features of Hippo
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