Folksonomy
I really tried not to post about it, but Folksonomy is stronger than me: it is in everywhere. If you use Del.icio.us, Flickr, Furl or Technorati you know what I'm talking. There are many good articles about it on blogs, that talk about Folksonomy, also known as is a social classification. For me, the best part of this is the free tagging system where everyone can create and participated of this hole thing. Take a look at Metafilter Tags and see a difference that makes a difference.
