Social Communication Graph: sixapart.

Like the social graph in yahoo's recently launched Universal Search, this tool is only in English and more professional. Its combination of applications may be relatively weaker than yahoo's. Personally, I think the more visually impactful social graph has a lot of appeal for sns sites. Didn't yahoo combine it with search? If you add the elements of IM and blog, just like sohu small paper slip embedded in the page, it may become a social networking site innovation, of course, you can also put "meal" and email into it!