I actually do use the 'save' feature in reddit. I find it a handy way to distinguish articles that I found especially useful or high-quality, or that I know I'll want to look at again in the future. Maybe I'm an exception though, because I don't use browser bookmarks or any other bookmarking-type service very much.

That functionality still works in lesswrong just as it does in reddit, but there just isn't a link to get to the page that shows all the stuff you've saved, as I noted elsewhere in this thread.