In my knowledge there a variety of websites that are a great deal bookmarked on del.icio.us.

I have done a fast research of all fifty popular tags on the del.icio.us popular pages and made a list of the WebPages which receive the most bookmarks.

There are clearly a huge amount of different content types on del.icio.us so I am only listing out the types that you can easily integrate into a blog. Also included are brief examples of each content type:

Blog Posts in the form of Numerical Lists
Web Comic tiles
Free Web Design resources
Humorous Articles on Personalities
Detailed How-Tos and final Guides
Web-based application and tools
Interesting Videos
Open-Source or Public online resources
Theme-based Photo Albums
Online Games
A JPG image on a website

This list is limited to Del.icio.us; I do think it provides a suggestion of the type of matter that will be popular on other social bookmarking or voting websites as well.

In a way, the organization of these popular articles can serve up as blueprints from which to develop exact content that will be well-received between a broad viewers.