“WiiConnect24 enables Wii to stay online 24/7 and download updates – even on standby”
Yes, my Wii is always connected to the internet. If your Wii is in standby and the power light is orange, its connected. If its on red, its not. I get updates every once in a while about new stages for brawl.

“Users would wake up each morning, find the LED lamp on their Wii flashing, and know that Nintendo has sent them something.”
Sometimes I wake up at 3am because the LED is so bright, but yeah, I get stuff often. It’s usually messages from my friends, but sometimes it’s messages from Nintendo telling me there’s a new channel or update.

“They would then be able to download the promotional demo from their Wii’s to their Nintendo DS’s.”
This is the only thing we don’t have yet.