Get your facts right before you post.
DS production hasn't yet stopped, Nintendo have merely stopped forecasting sales for the device. If you judge production of a device by that yardstick, then bad news--Sony have now stopped forecasting PS2 sales, and have only forecast expected PS3 sales for the coming year. Obviously the PS2 has stopped being produced, no?
OR, think a little more clearly, and realise that both systems are now in the same place. Sales are low enough, and other systems are more of a priority at both firms, that PS2 and DS no longer need to be forecast. The information is no longer particularly relevant to investors, shareholders and analysts.
It should also come as no surprise to anyone that PS2 remains the top selling system of all time. Sony are a huge consumer electronics firm that sell in a far wider variety of markets than Nintendo do, which means Sony have a more widespread, superior distribution network through which they sold PS2 after sales in major videogaming markets had become a non-entity. The fact DS came so close to PS2 without that kind of distribution apparatus is immensely impressive. DS never had as large an audience to appeal to as PS2, because it was never sold to as many markets.
More importantly, both DS and PS2 were phenomenal systems with diverse, impressive catalogues of software. Why we can't celebrate that, instead of enduring another tribalistic, fanboy-centric circle jerk thread about PS2 versus DS? Or are the numbers more important than the experiences each system provided? Such a shame that fans of both sides of this argument haven't bothered to celebrate that, but instead opted for these kinds of silly little threads.