There are several makers of Linux laptops, at this point:
I've had great experiences buying from ZaReason, I know people who have had great experiences buying from System76, and ThinkPenguin is another option.
I'm writing this from a ZaReason UltraLap 430 (see recent review on Ars Technica, and a video review by Tom Merritt [note that there are a couple of mistakes about specs in the video]), which I love even more than the Thinkpad X-series that it replaced.
My wife has a ZaReason Alto 4330 that she loves even more than the Thinkpad X-series that it replaced.
For work, I've had several ZaReason machines--including some Alto 3880 laptops (the previous generation of what my wife now has). We got the Altos with 8-way multiprocessing (4-core + hyperthreading) and gobs of RAM, with run-times of 3-4 hours on a single charge and weight just over 4 lbs; they've made fantastic developers' laptops for us.
And, for what you get, the ZaReason machines aren't even that expensive (seriously--a monster-power Alto is only ~$1k).
If you ask for it, the computers even come with whatever username you want setup--you don't even have to fill your name into the account; you just turn the computers on and use them (if you don't ask for it, they infer it from the name on the order).
As I understand it from my friends, System 76 is basically the same way, except that they're Ubuntu only.