Hi woodman,
How about wireless alert?!!
If you're patient to apply some work here, I can you tell this can be solved nicely by a set of RF modules like VG40T/40R.
1. Sense the phone ring using either a magnetic catch or any kind of coupling and get a signal.
2. Amplify it and feed to a switching transistorized circuit to activate VG40T(Tx).
3. Receive the signal through VG40R and activate a dc motor vibrator through a driver transistor. Place the receiver unit in your pocket like a mobile phone. Thats all
Receiver module should work on 3V. So a 3V rated motor and 2xAA cells should make your alert box pretty done!
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