Diigo seems to be a mashup of many of the best features of del.icio.us, facebook, tumblr and twitter. You can save bookmarks, share them with friends and with groups, join groups, send each other links and messages and comment on your friends' walls.
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The Power of Educational Technology: One For Tuesday 3-25-2008 - 0 views
Diigo API - Seeking advice on how to reach out to developer community - 366 views
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