Price Guarantee Credits on hardware..

[DannyZR2]

I found this on the ADC page .. not sure if it applies to all Apple Store sales...

Should Apple reduce its price on any product shipped to the United States within 10 calendar days of shipment, you may contact Apple Sales Support at 1-800-793-9378 to request a refund or credit of the difference between the price you were charged and the current selling price. To receive the refund or credit you must contact Apple within 14 business days of shipment.

If you just bought a Powerbook Ti (prices were just lowered $200) perhaps you should call and see if you're good to go for a credit... Worth a shot!