I don't know how the logistics of this would work but, if possible, could blu-ray.com implement some sort of alerts service that informs people about new blu-ray listings on Amazon.
The reason I would like to see this feature is that Amazon quite often have the lowest preorder price on the first few days of the listing and if I do not hear about it within that timeframe then I lose out on the best price.
I know there is a 'New Blu-Ray Preorders' section on the front page that is useful but I don't think you can subscribe to it, please correct me if Im wrong.
Thanks for your consideration.