Moving to Ubuntu for mobile development

My web-development office is a fast-moving place. It averages around 50 miles per hour, and I work on a laptop normally squished between two people on the train to and from the office. When I happen to have a spare moment to build websites at home, I tend to use my desktop, which is running Ubuntu. I do my editing in emacs, where I've gradually got things set up more or less as I like them.