It's certainly possible to port Linux on the Clickpad and Touchpad, but those have less RAM (and a terrible screen), so the resulting Linux + userspace would be able to do less than on the CX.
The CM and CX are (normally) extremely similar, and porting is bound to be straightforward, but very few people in the community have them.
Terrible screen? Yes it does ghost, as do most greyscale screens, but I wouldn't go as far as it being terrible.
Try to play Super Mario Bros Deluxe on that screen. You'll change your mind
