Well Sd cards are getting huge, but it seems as though their incompatible wit the Wii, on the otherhand now that nintendo is number 1 if it released a $60 HDD then everyone would by it. I say the limit to a game size should be like 640 mb, or just more than half a 1gb sd card, equal to a cd, and like the most anyone would ever be willing to download. You could have 1 or 2 big games per sd-card and thats it. You could either buy more sd-cards, or if they do offer an hdd solution, than only that audience should buy one.