Why Yahoo is not monetizing this site yet? Maybe del.icio.us stands for a later bigger project or something? I guess we will get the answer in the future…
But as mentioned here :
Joshua made an interesting distinction. Instead of finding information a la Google, social search is about finding knowledge. The idea is how do you connect with the information you need in a context that’s knitted together by people and by human expertise, rather than the linear way we do it now, which is to type a search term into a box.
It seems that what I thought before some months is real and is about to happen soon. What is this? A search engine powered by social network data. Think of it, it could be a great search engine, and best of all spam free as the rankings would come from the users.
My opinion is that stumbleupon could do this right, but it seems that del.icio.us is going for it right now.