Fake Call

Fake Call is a program that is intended to give Treo 600 smart phone owners a way to escape impromptu office meetings and unwanted social interactions using the Treo -- by simulating incoming phone calls! With your phone in your pocket, press and hold a hard key or setup an appointment in the Contacts application and voila! A call will materialize from anyone you want, your phone will light up like a Christmas tree, your favorite ringtone will sound and, when you accept your fake call, an active call screen identical to a real one will display and a voice will be heard on the other end of the line! This program is a true escape from any unwanted situation!
http://www.toysoft.ca/fakecall.html