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For a wider selection of Linux laptops, check out http://emperorlinux.com . They take stock laptops, work out the kinks, document everything necessary for a Linux install, and give you a well-crafted laptop with a custom disto(or other popular distro, your choice and Windows, too). The prices are a bit higher, but they have a nice selection of models and offer to do custom work.
You'll find "desktop replacement" and "ultra portable" laptops here.