For all you 3DS Ambassadors out there (bought the system early) the 10 NES games are available for download now.
To download:
Go to the e-shop
Scroll left and go to "settings/other"
Hit "Your Downloads"
Scroll down and hit redownload on the games you want.
The 10 games are
Super Mario Bos.
Metroid
Legend of Zelda
Wrecking Crew
NES Open Tournament Golf
Donkey Kong Jr.
Balloon Fight
Ice Climber
Zelda II
Yoshi
The GBA games will be available later in the year.
Well, I'm going to go get some Zelda II action!