That's delicious!

I've been using this social bookmarking tool for some time now. It's a really nice way to store and share your bookmarks with others and see what your friends are reading. However I've also been using another bookmarking tool called Diigo. I save my bookmarks in both. Why do I also use Diigo? I like the highlighting and commenting functionality they offer. It helps me not only save bookmarks, but also easily find back key parts of the webpages I liked in the past.