Yesterday I bought myself an Asus Zenbook UX32VD.
I downloaded and installed Linux Mint 13 "Maya" - Cinnamon (64-bit) on it.
After trying (and failing) for hours to get a setup with 3 screens (internal, hdmi & vga) to work, I installed the mate-desktop-environment. With Mate the multiple monitors worked right away and were beautifully easy to configure.
But now with mate I have another problem:
The fn+F3 and fn+F4 keys which control the keyboard background elumination don't work under Mate. In cinnamon they worked after upgrading to the 3.5.0-6-generic kernel from the xorg-edgers ppa, and most of the fn+* key combinations still work under mate, which they did not do with the 3.2.x kernel that came with the default installation