Here's my email back from Amazon:
Greetings from Amazon.com.
Again, we sincerely regret the error that resulted in an incorrect
price being displayed for the "Xbox 360 Video Game System (Fully-
Loaded)".
Because this item's correct price was higher than our stated price,
we made the decision to cancel this item. In accordance with our
posted policies on pricing, we were unable to offer this item for the
incorrectly posted price.
Our pricing policy is posted in the Help section and is accessible
through numerous other areas of our web site. You can read it here:
http://www.amazon.com/o/subst/help/pricing.html/
We realize that the cancellation of this item may have been
disappointing, but we want to make sure that your decision to make a
purchase with us is based on the most accurate information possible.
Thanks again for letting us know how you feel about this issue. I
hope you will give us a chance to serve you again in the future.
Best regards,
Senthil
Amazon.com Customer Service
http://www.amazon.com
Sounds to me like they've got a bundle package in the works and don't want to admit it.