With the level of anticipation surrounding Jelly Bean and CyanogenMod 10, pretty much any news of a working build is good news. Today, test/preview builds of CM10 have surfaced for Motorola's Xoom as well as the ASUS Transformer and Transformer Prime (tf101 and 201).
Of course, since these are preview builds, they aren't perfectly stable. It's also worth noting that unofficial builds carry no guarantee of support or update.
That being said, the Transformer builds are surprisingly functional with Wi-Fi, Bluetooth, sound, camera, video acceleration, some dock functionality, and most sensors functional. GPS and light sensor functionality isn't quite there yet, but most of the device's critical functionality is present.