The DS has been kicking ass month after month in sales. Nintendo wants to press the advantage by instituting price cuts for the DSi and DSi XL.

On September 12th, the DSi's price will be reduced to $149.99. The DSi XL will sell for $169.99. Nintendo will be keeping the DS Lite at $129.99.

The new 3DS model is expected to hit stores before March 2011 so these price cuts were probably made in preparation for that. Nintendo was probably also trying to make the DSi and DSi XL more competitive with the Lite, too.