Ask HN: Cheap and Cheerful Laptop for BSD/Linux: what are my options?

In the title. I have a 11" 2011 MacBook Air (which I feel is one of my best consumer decisions to date, and isn't going anywhere) but I'm looking to purchase a cheap laptop that I can just run into the ground. It should be compatible with Linux/BSD out of the box. That means integrated graphics and solid network interface cards. What are my options?

Edit: Battery life is not an issue. I am tempted by a cheap desktop, but I hate the idea of having cables everywhere and a great big stinking tower under my desk.