Hence the rise of services such as Path, an American network that limits members to 150 friends.

ECONOMIST: The world��s most exclusive social network

Privacy concerns over the issue were touched off last week when a Web developer blogged about his discovery that Path, an emerging social app that limits users to 50 friends, was uploading his iPhone address book to its servers.

CNN: Doug Gross,

It is a path Kennedy has chosen, in part, out of awareness of his own limits.

CNN: latimes.com: Talking baseball and politics with George W. Bush