1.  And, as I discovered, it can notify your friends of an impending rendezvous.

2.  After launching the site and notifying a few friends, others sent pictures.

3.  He confirmed the new numbers and installation date four times, then had stationery printed and notified friends of the new numbers.

4.  When a president notifies his friends about his plans, he also notifies his foes.

5.  Though there is the minor matter of notifying her friends at home of the win.