Several users have reported purchasing new Wii consoles that will not allow any of the current Wii softmod packages to be installed. WiiNewz has confirmed with a member of Team Twiizers that these consoles contain boot1 (as mentioned in the HackMii blog post HERE) and will not work via soft modding. There is no "fix" forthcoming.
At the time the HackMii article was written, it was speculated that only 10% of current Wii stock contained boot1. More systems are now showing up. It would appear that Nintendo is now working to completely block softmods. This will not have any effect of soldered or solderless modchips or the majority of homebrew... yet.