THANK YOU NINTENDO!!
Okay, this was the LAST concern I had--and my, and everyone else's prayers have been answered!!
Wii U WILL be able to support Data transfer from Wii---meaning ALL the Wii VC and WiiWare games you have will be able to be transferred from Wii TO Wii U!!
Nintendo is currently working on a system to do so, and I know they'll have it up and working by the time Wii U launches later this year.
The answer came in a Q&A session, with one of Nintendo's producers giving us ALL a smile:
We are readying the system to be able to transfer saves and everything you've bought.
BUT It's happening, and I couldn't be happier.