Rather than tags, this site uses "trails" from the ant colony metaphor. Trails can be organized into folders, maintained by groups. Does not appear to use tagging
BlogMarks is a collaborative link management project based on sharing and key-word tagging. Build on a blog basis, BlogMarks is an open and free technology. Now, you can access your favorite URL's from any computer. And with BlogMarks, you share your favourite with other users.
On Clipmarks.com, you can see clips of text, images or video about all sorts of topics that other people find while surfing the web.
The idea is that through each other, we can learn more, know more and enjoy more than we could possibly do alone. As you find people who post clips that interest you, make them a Guide. Think of your Guides as a team of web editors you choose to consistently deliver you clips of things they find on the web.
Group items tagged 
