When it comes to laptops that solely ship Ubuntu as an Operating System one of the most well known names is System76. During the Ubuntu Developer Summit in Oakland, CA a few weeks back I had an opportunity to chat over lunch with System76 CEO, Carl Richell about the exciting products they are working on at their Headquarters in Colorado. Carl invited me to check out one of their current laptop offerings the Lemur Ultra which I spent some time with here in the labs.
Computing company System76 have begun shipping laptops pre-loaded with Ubuntu 12.04. The 'Precise' release is provided out-of-the-box on two models - the 14.1" Lemur Ultra and the 15.6" Pangolin Performance.