They did advertise that capability early on.
My guess: They're A) going to do it eventually, but have various games to finish first, and B) waiting to lengthen the Wii's popularity and features, for the same reason that they don't give us every game in existence on VC today right now.
Japan has DS demos available for download on a Wii channel, Everybody's Nintendo or something like that, so the US should get something like that this year I imagine.


LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )







