A new discovery for me is the del.icio.us search engine/bookmark keeper. I haven't explored it very much but it is a really interesting way of following links.

Items posted to del.icio.us are given some keyword tags by the poster. Then an interested person can look at all the items on del.icio.us with the same tag. This leads to all sorts of serendipity in the results. Because the person who posts the item decides what keywords to associate with the item rather than, say, Google or Yahoo, the results are both more and less pertinent.

My current bookmarks are currently only my own blog posts just to test out the system but you can post any URL to the system and assign keywords. In essence, participants decide on the categorization of items.

This is from their about page:

del.icio.us is a social bookmarks manager. It allows you to easily add sites you like to your personal collection of links, to categorize those sites with keywords, and to share your collection not only between your own browsers and machines, but also with others.

Once you've registered for the service, you add a simple bookmarklet to your browser (see below). When you find a web page you'd like to add to your list, you simply select the del.icio.us bookmarklet, and you'll be prompted for a information about the page. You can add descriptive terms to group similar links together, modify the title of the page, and add extended notes for yourself or for others.

You can access your list of links from any web browser. By default, your links are shown to you in reverse chronological order, with those you've added most recently at the top. In addition to viewing by date, you can also view all links in a specific category (you define your own categories as you add the links), or search your links for keywords.

What makes del.icio.us a social system is its ability to let you see the links that others have collected, as well as showing you who else has bookmarked a specific site. You can also view the links collected by others, and subscribe to the links of people whose lists you find interesting.