A good find by Scoble on one of his many product highlights. The cool thing about this is that the tags are defined for you from a mined database. Similar to the approach facebook has taken to make a more accurate social graph, this provides more accurate tags and bookmarks - with a semantic twist.
These are some good friends of mine. Visit http://www.zigtag.com and sign up for the beta if you are in the tech-friendly generation. This is a must have tool.
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Just signed up yesterday, and playing around with it a bit now - very cool app.
Do you know what the “request freindship” thing is about in the groups?