We love it when Amazon runs deals like this and they have had many going lately. They are offering $30 in promotional credit when you purchase select Nintendo DSi consoles. Sounds like a sweet deal to me.
Here are the Nintendo DSi choices for the $30 credit:
$30 Amazon.com Credit: Order any of the above Nintendo DSi Consoles and receive a $30 promotional credit toward the purchase of items shipped and sold by Amazon.com (certain exclusions apply, including Kindle books, MP3s, and video rentals and downloads). The promotional credit will be added directly to your Amazon.com account within two days after your order ships. Offer valid when shipped and sold by Amazon.com. Limit one per household. Amazon reserves the right to change or terminate this promotion at any time.