According a recent Nintendo estimate, DS sales are topping sales of Sony's PSP by a rate of nearly 3:1. According to Nintendo handheld product manager James Honeywell, sales of DS hardware and software are both skyrocketing:
"Up until the end of last year sale between the two formats were fairly evenly matched, with DS slightly outselling PSP," he said. "Since the beginning of the year, with our stellar line-up of releases, we have pushed our sales through the roof. Then with the fantastic launch of DS Lite in June we have begun to pull further and further away.

Caption: This is probably why we are being outsold, PSP needs games like this!
"Right now, with the combination of DS and DS Lite we are outselling the competition by a ratio of 3:1. This increase in hardware sales has also driven an increase in DS software sales, moving ahead of PSP in the total number of units and also, more interestingly, we have now seen that the same third party titles are selling more on the DS than on other formats."
Honeywell adds that publishers are starting to put more content on the DS that takes advantage of the system's features, rather than simply porting titles from other handhelds or consoles.