Rock Band Special Edition for the Nintendo Wii pre-orders have kicked off at Amazon.
The list price is $169.99 with free super saver shipping, but if the price dips between your pre-order and the ship date, you get the lowest price. They are showing the ship date as June 22, 2008 at this point. In addition, Amazon does not charge you until it ships, and you can cancel your order at any time.
If Guitar Hero for the Wii is any indication, these will be hard to come by once the product ships...
Check it out: Amazon - Rock Band (Nintendo Wii)