Socialmarks is a new service that is a Social Bookmarking system (getting ready for Beta release) that will allow you to manage RSS/Atom Feeds and bookmark its posts with tags. But, it goes further. I would have been happy with just bookmarking the posts from the feeds, but with Socialmarks, you can even tag the RSS/Atom Feeds themselves. I really like this concept because instead of only websites being in the social bookmark system, RSS/Atom Feeds can be as well.

Social bookmarking sites generally organize their content using tags. Social bookmarking sites are an increasingly popular way to locate, classify, rank, and share Internet resources through the practice of tagging and inferences drawn from grouping and analysis of tags.