I just got a letter from Apple r.e. the Mac Pro I ordered on Aug 8th:
To Our Valued Apple Customer:
Apple is pleased to announce a price drop for the Mac Pro you recently
ordered. We have automatically adjusted your order to reflect the new price.
For up-to-date information on your order, please visit our Order Status
Once your order is shipped, you
can also obtain tracking information on this site.
Thank you for your interest in Apple products.
Apple Store Customer Support
I checked and my before-tax price went down by $96. Huh.