Thats right, Set CPU has been updated to version 2.1.1a to support our Xoom's dual core processor.
Also, the developer behind Set CPU, the one who successfully overclocked the Xoom to 1.2Ghz yesterday will be releasing the kernel patch at some point today. Take note though, that the overclocking method used will only work on the Xoom and not on other Tegra 2 devices as they used different Nvidia based drivers.
Thanks to CZonin for the find