Personally, I still prefer Yahoo's bookmarking feature; in fact, I've wanted to recommend it for a long time!
For friends who have blogs, it is indeed quite useful. Doesn't KESO often bookmark articles he finds fascinating?
When I first switched to the Pjblog system, one of the first things I did was start using Yahoo Bookmarks.
It's very simple to use: as long as you have a Yahoo account, go to your bookmarks, then under the tools section, select "Publish bookmarks to personal space," and you can get the relevant code based on your selections...