my ps3 has a 60gb hard drive and that still aint enough, i'm upgrading it to a 250gb when i save up enough cash AT LEAST the Wii should support SDHC type SD cards as standard, that would give you a bit more space.
i'm guessing nintendo are holding off supplying a hard drive becasue they loose money? but in fact it would be the opposite as people would download more games to the Wii if we all had bigger enough hard drives, and btw thebobevil, even if you say nintendo will release a hard drive in japan only (which would be stupid on their part) most people around the globe would be able to import it anyway or there will be 3rd party ones which would in fact work out cheaper than the official nintendo hard drives.
nintendo's ignorance will not pay off if they keep ignoring the advancement in this gen's gaming, releasing wiiware with huge downloads on a small 512mb flash drive is a joke to say the least, instead nintendo want you to suffer and force you to download from their servers each time you want to play the games after you delete them, on top of that nintendo will no doubt not let you backup your games to a hard drive either, oh no, they would loose money that way! money, money money, is all that makes the world go round ¬_¬
i think in the end it will be the Wii hacking scene who will be making use of those currently useless usb ports at the back of the Wii with a nice loader software to boot everything from a nice sized hard drive
regardless if nintendo release a official one or not, at the way the Wii scene is progressing now i don't think it's that far off, give it about 6 months or so and we will start seeing progress.