Google launches the Social Graph API, which Brad Fitzpatrick wrote about.
Social graph will show all public connections of all services supporting XFN (XHTML Friends Network) and FOAF (Friend Of A Friend).

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There is already a demo "My Connections"
socialgraph-resources.googlecode.com/svn/trunk/samples/findcontacts.html* On the issue of privacy: they write that only public "links" will be indexed
** C bash in subject
2010 Court.
Prosecutor: Did you know the deceased ?!
Defendant: No !!!
Prosecutor: And why was he in your friends VKontakte ?????
(now the judge can check all your links by entering only one blog address?)