I currently use the Samsung Chromebook 2 with Ubuntu via Crouton, and it runs nicely. But it's not the same as running a full GNU+Linux system with free software and hardware, and the on-board 16 gigs of storage is rather limiting. I would be all over this if the motherboard were made available.
I've tried Chrubuntu and it doesn't work as well as Crouton. The wifi, specifically, is flaky. Have you had better luck with the Chromebook 2 specifically?
It's been a while since I've used it and it turns out it's a first generation Samsung Chromebook (XE303). I don't remember having any WiFi-related issues.
The source code used to build the kernel for ChromeOS should be available so I'm surprised this sort of thing is a problem.
