Linkedln for New Work
Apparently, one lawyer constantly reviews his Linkedln page so that when one of his "connections adds a connection, he is notified of that. If the new connection is someone that [he] would like to know professionally, he telephones his connection and asks him or her to make an introduction . . .[he claims to have] garnered a number of new cases and clients via this method."
(An even simpler way of doing that is by subscribing to your LinkedIn network updates via RSS - there's an orange RSS icon next to the Network Updates header on your homepage.)