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POPSSearchles: social search Apparently there's some buzz about this service. I don't quite understand what it does yet. It combines bookmarking, social networking, and search so you can depend on trusted results. Apparently.
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POPSMoustache May. Guys: post your 'stache here, quick Moustaches 2.0. A moustache-growing social networking site. For the month of May 2007, post photos of your growing moustache, and rate and comment on those of others. Make new friends! Change the world! Waste your time!
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POPSJukeFly: access your music collection from anywhere Seems handy. A nice snappy interface that allows you to stream your music collection into any web browser anywhere. Some social features. Built with Flash. I haven't tried it; if you do, leave a comment. Discovered via Twitter.
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POPSIntroduction to "communities of practice" Not sure what to make of this concept, but it's interesting. Link should be www.ewenger.com/theory. Author's comment: Theoretically, my work focuses on social learning systems.I am trying to understand the connection between knowledge, community, learning, and identity. The basic idea is that human knowing is fundamentally a social act. This simple observation has profound implications for the way we think of and attempt to support learning.