as can be seen
here node.js precompiled libraries are only suitable for hard-float distibutions (like raspbian wheezy)
Can I use them on xBian ?
I don't see why not.
Check to see if your version of Xbian has the file /lib/arm-linux-gnueabihf if so then it is using hard-float.
If not use RaspXbian as detailed
Here
XBian has been compiled with hard-floats for ages.