I recently bought a Toshiba Portege Z930, running
Linux Mint 13. I just had to upgrade kernel to
have it working without any problem (before I experienced
some random freezes). I am very happy with it.
I have Ubuntu 12.10 on my Portege Z935, it works well, if not perfectly. I have mixed feelings about the hw itself, however - the trackpad isn't too great, esp. the buttons. A good machine to use the mouse of you choice with, if it isn't in your lap.