Checking out Del.icio.us

Today I checked out Del.icio.us. This does seem useful for researching connected articles and seeing what other people are reading on a topic. The idea of the user attaching the subject heading is very interesting. It reminds me of the advantage of controlled vocabulary being that everyone goes to the same subject heading on a topic. With Deli.icio.us it seems that people could use disparate subject headings and miss out on an important article.