From what it seems is that they are trying to make sure the update works with all Wii's with all firmwares.The Wiikey site has also updated. From reading it, does it mean they won't release the firmware update until they find out why it doesn't work? People already know how to make the discs work so if they aren't releasing the update for this reason seems pretty stupid...Hopefully one of the beta testers will leak the update if the Wiikey team decides not release it.
Since they linked to the other forum with a workaround on the config disc, I assume they are up on things.
I admit, I was one of the doubters that thought they developed this chip, released it and then just high-tailed it out.... But I forgot this is the same group that developed the XenoGC. So, with the recent updates, they have renewed my faith in them.