http://www.nintendo.co.jp/wiiu/hardware/features/index.html

Using various translators you can read the text, but the pics by themselves are nice.

Some interesting tidbits:
SD card slot doesn't apear to be for anything else but Wii BC.
Cannot "copy" data on WiiU to usb device... only move to one or other.

Wii channel appears to do everything Wii related, including its own shop and VC/WW titles.
-Maybe future it will be properly integrated?
-This is why Wii stuff including VC can'tuse gamepad... may need to keep classic controller afterall?

If you can read Japanese or have more info, please add. Hopefully NoA will get shit together and get similar pages up. Can't beleive we launch first and this stuff isn't there yet.

to be honest i'll be disappointed if nintendo doesn't figure out how to properly integrate wii vc purchases to function as if they were purchased on the wii u eshop. i'm not sure why that kind of integration would be impossible. my hope is that at some point i will be able to play vc games on the gamepad, even if that function comes in an update some time later.

They did the Wii VC and Shop isolation thing so that, just as with Wii, BC can be turned off in a few years on future models and they won't need to carry on supporting it.

This also means that Wii purchases won't carry over to Wii U+1. This is a one-time move, not a genuine attempt to make an account system so that you can access your purchases for the rest of time.

While that example is stupid... it will only be acceptable if they do not wipe the Wii after transfer and therefore I can still play all the same digital content in the same manner as my Wii disc content. This will be the only reason I keep the Wii.

Shit, I hoped I was misinformed, but it turns out to be correct. It's even worse as everything Wii related isn't integrated in the WiiU OS but as a subset app... so, even Wii content won't be sold on the eShop or what? That didn't happen on handhelds...

We've talked legacy compatibility before, but that with respect to controls. Really, with proper remapped controls, the Gamepad could act as a CC, sideways Wiimote... and even as a TV screen including sensor bar.

Although it does seems that digital content will have a life of two gens.