Thing 17: Folksonomy & Del.icio.us

You can't really get a handle on Del.icio.us until you set up your own account. It definitely makes for nice portable bookmarks. As to the research application, it has some of the problems of wikis, but at least you can get a sense of what is popular, which one could assume would tend to be the most useful, although not always for what you, in particular, want.