UPDATE - It seems the NYT got a few things wrong, including this important detail:

An article about the Nintendo DS video game system in the Dec. 31 Business Day section of the New York Times incorrectly referred to future capabilities of the device. The statement that complete Nintendo DS games will eventually be able to be downloaded into the device via a wireless connection with the company's Wii game console is incorrect. Users can download games to play on Wii, and, in the future, the Nintendo DS will be able to receive demo versions of some DS games from Wii, but not the entire game. The demo will be erased once the Nintendo DS is turned off.

The New York Times today, in an article lauding Nintendo's Wii and DS has an interesting little tidbit from Nintendo of America President, Reggie Fils-Aime.

"Mr. Fils-Amie [their misspelling] said that future DS device will be more tightly integrated with its Wii console. Complete games as well as game samplers will be able to be downloaded into the Wii using its broadband connection, and then transferred wirelessly to the DS." (NYT)

What I find interesting is the "future DS device". It's not as if Reggie is saying that the current DS Lite and DS have this capability, although they do have WiFi. The main problem is storage...where to put the games.

A future version of the DS may have an internal flash drive (think of an iPod Nano) or it may come with a memory cartridge on which to store several games.