I heard another rumor tonight... nothing at all confirmed, so likely just pure speculation but someone close to the Viper/Cobra Team mentioned to me that it may be possible to use your existing hardware (ViperGC/Extreme Mod) to play Wii back-ups soon. This would be done using an updated "Cobra" BiOS for the ViperGC/Extreme Mod that supports the Wii images, however, you would need to re-install the Mod into your Wii of course using new 'solder points'.
From a developer standpoint it may make sense- instead of engineering, debugging, manufacturing, and marketing an entirely new PCB design, simply update the existing one via Firmware and continue selling ViperGC/Extreme Mods for all Wii customers. Time will tell if there is any truth to this, but if this is essentially what the Xeno folks are also doing it just may be possible. :eek2