I think the memory of the wii can and will be expanded. I've been thinking guys and lets remember, the wii is targeted at Casual an non players. I've been playing video games for over 20 years and my desire as well as other long time gamers has increased substantially.
It will take newbies years b4 there desire reaches the desire of long time gamers. Now on the otherhand, the wii is capable of expanding, but someone needs to tell Nintendo to get the malassis out there A%* and come on with it.
I still have a fair amount of memory left but i'm still waiting for some type of storage device be it harddrive, which is unlikely, but who knows; or allowing games to be play from a SD card.
Nintendo has finally made it back to the top, would some one tell them it wont last long if they don't start thinking about there customers! Especially the hardcore!