I like Jon's idea that would be a good implementation, he did say some would be hidden and I dont recall him saying how they would be unlocked.
Also, perhaps the delay will allow Nintendo to update the VC roster to keep up with the games demos. It's a far better reason than my personal hope (and of many others I'm sure) that the delay will allow it to coincide with the release original content on the WiiWare channel, which of course would include updating games and of the external HDD.
I would love if it was SSD if for no other reason than to one up Sony and MS both of whom's computer divisions will be pushing this product elsewhere, but man it would be expensive! Although it would be a good jumpstart on getting them mass produced and the initial cost may drop in light of demand if it does release with SMB which is undoubtedly going to sell insanely well everywhere, and thus increase demand for the drive SSD's in general and we may see them appearing in more consumer devices sooner than expected, but I digress.
Just in case; SSD is a Solid State Disc, it's basically a really big flash drive, so it's a whole lot faster, uses a whole lot less power (cuz it doesnt need to spin), is quieter(see reason for less power), and is infintely more durable. I think right now the biggest SSD you can buy is 64GB so they've got a way to go on development, but for a non-entertainment center doubling console a smaller 2 - 8GB drive (that works with existing drive in the Wii instead of the way SD cards do). That actually makes me think that instead of going through all that trouble they could just allow us to use a USB flash drive in the same fashion, they could even sell Wii branded ones, or for the sake of not transfering games and such make Wii-only drives, but perhaps just make a write-protection software embedded into the files, like DRM, instead of how memory cards used to be console specific in the old days.