Hee hee, that is funny.
At this point, I think Nintendo needs to do these things:
1. Keep 3rd party support as strong as possible. Games will probably be the main deciding factor in the winning system.
2. Market, market, market. DS better meet PSP face-to-face in advertising.
3. Start building a supply of "mature" games. I'm all for Animal Crossing, Super Princess Peach, Kirby and Yoshi's Touch n' Go, but honestly, this is exactly the type of stuff Nintendo haters expect from the company, and since DS is supposed to be aimed at an older market, that's not good. Work out contracts with other developers to create exclusive mature content if necessary.
4. Produce games that take full advantage of the DS' special features.
5. Possibly a price drop. Honestly, I don't know if this will help much at this point, since Sony is clearly willing to lose money to remain competitive, but there's no denying that the DS' price advantage is not big enough to impress anyone right now.