Ask HN: what could be the next gen of Delicious? (For orgnizing inforamtion)

I always see Delicious as a human-powered Google, in which our tendency for structure and mob effect organizes the information (links).

However, I wouldn't say Delicious is the only, nor best way to do what it supposed.

So if you can build a new system today, that helps people to organize their information, maybe even leverage the existing social graphs (Facebook/Twitter). What would you have done differently from Delicious?

Let's hear them out.