So we all know that the Wii U will support Wii games. NCL has a bunch of details on the Japanese site for Wii U including BC info.
-Wii software (disc software, WiiWare, VC) must be accessed within the Wii mode and won't appear on the Wii U's menu.
-All software will run in 480p/480i and not in HD.
-Wii games (including VC) will not run on Game Pad.
-You must download all WiiWare/VC through the Wii Shop Channel, not to be confused with the Wii U's eShop. It's unclear whether or not you'll have to re-download all of your old downloadable games through the shop or if they'll come over in the Wii To Wii U transferring.
-WiiConnect24 will not work on Wii U.
Links are here
May I be the first to say, welcome to your Nintendo-based DD hell.