[oditogre]

>2 Receive real time updates of cool links shared by people you like

How do you handle a link that gets sent to the same person by two people? What about a link that you yourself sent? Can it be 'sent back' by somebody that you follow, that doesn't follow you (i.e., they don't know that you've already seen it)? I'm kind of thinking of situations where, i.e., person 1 'watches' person 2, 2 watches 3, 3 watches 1, and a, b, c, ... z watch 1, 2 and 3, and it makes me think of that 'Bedlam DL3' story Larry Osterman wrote about a while ago (http://msexchangeteam.com/archive/2004/04/08/109626.aspx).

I mean, won't this cause a lot of duplicate / unnecessary traffic through the server and possibly to clients? Or are you doing it in some other way than how I'm thinking?

[garbowza]

This happens all the time: multiple people you are following share the same link. In fact, that is one of the cool effects: a shared link starts spreading through the social graph. What you as an end users sees in your sidebar is a single view of that link, with multiple small user icons lined up underneath it, showing each of the users to have shared it. Think of Gmail's message threading.