By the way, OpenWii just came out with this DVD upgrade feature, and that's all they included in this update, so nobody has used the feature yet anyway.
I just don't see, at this point in the game, what you would need to update anymore! You got a modchip? Does it play backups? Does it have what few configurable options we'll ever get for a drive chip? Does it support on the fly region patching?
Someone posted this on the OpenWii forum, the reply was that... They already have beta releases (not public releases) to test it on, and they have confirmed it working... why else would they release this feature without testing it?