Dell releases powerful, well-supported Linux Ultrabook

Here is a question (sorry to try and hijack this thread): this is a great laptop, but while we're at it, have people had good experiences with other ultrabooks?

My experience has been that things like EFI have made it impossible to boot linux on recent macbooks (I have tried!), and many ultrabook hardware just doesn't work on linux. Graphics won't show up, the thing won't boot, SATA hard drives not found, etc.

Many of the websites I used to rely on (eg, linux-laptop.net) have very out of date information. Ubuntu has a list of certified machines (http://www.ubuntu.com/certification/) but still, it doesn't tell me much about ultrabooks released in the past year.

Are there any new resources I'm missing? Or personal experiences people can share?

As for myself, I'm successfully running Mint on a Toshiba Portege ultrabook. But that is the flimsiest computer I've ever used!

For the near-1kg range: Samsung Series 9 (NP900X3C-A01US)

Ubuntu 12.04.1 installs & runs without modification, but some minor Fn keys didn't work (e.g., WiFi toggle button).

Arch Linux with systemd installs & runs fine, and it had great battery life because 'rfkill block all' seems to more thoroughly power-down those circuits on Arch than Ubuntu. (well over 7 hours with wired ethernet, plus Emacs and Firefox in heavy use)