Top 10 Social Bookmark Sites (About.com)
“What are social bookmarking sites?
Basically, these are sites that allow users to post their favorite sites, using tags (or keywords) to categorize and organize them; then other users can take these bookmarks and add them to their own collection or share them with even more users.
Here are some of my favorite social bookmarking sites that I use every single day.
5) Yahoo My Web 2.0 Beta