The Wii has/uses/supports/handles SD cards, QuickTime movies, DVD-variation discs, IBM CPU, ATi GPU, JPEG images, Opera browser, email, Wi-Fi, Bluetooth, USB, and probably more.
My point is; they borrow and adapt technology from everyone else but they can't even use a totally standardized filesize nomenclature? I'm all for simplicity but I'd rather they call filesizes as "bytes" or "kilobytes". Even "bits" is more understandable than "blocks".
Are the "blocks" even the same size as N64 and GameCube "blocks"? I have an N64 DexDrive somewhere so I suppose it would be easy enough to check...