What about Del.icio.us?
But how much interest does Yahoo! really have in this product? They didn't even bother to integrate their login system as they did with Flickr within just a few months. And in general not all that much was added feature-wise to the site after the acquisition. Private bookmarks were added in March 2006 and Networks, which basically is nothing more than a low-level friends-feature, a month later. After that there came only minor improvements and since late 2007 there is mostly radio silence. I guess that's it for del.icio.us then
