The Nintendo DS is already in its second iteration, which btw isnt very old but rumors of a new NDS are already abound in the blogosphere. Unlike the previous change which merely made the device lighter and the screen brighter, this time its expected that Nintendo will up the ante by giving in to dual touchscreens.

Its easy to see why the rumors have begin - its obviously something to do with the new Sony PSP 3000 ; but until Nintendo gives us their official word , theres nothing that can be proven by that. The new NDS however wont see the light of day until next year, which fits in with what Nintendo promised fans at the E3 convention - no new product announcements until next year .

Source