We know that we'd like a hard drive on the Wii-- and while we're dreaming, we'd like it to be free and preloaded with Sega CD games-- but we don't have any real evidence that one's coming. We first heard some unfounded speculation about it back in March, from a Japanese magazine.
Now the rumor is back, with just as much to back it up (nothing). IGN editors speculated in a podcast that Nintendo might show one at E3, and CVG saw the fact that Neo Geo games are big as evidence. Then, of course, everyone picked up on the rumors-- including us, right now. Not to say that there's no chance of a hard drive in the future, but we'd like to remind everyone that SD cards exist and are cheap.