To a lot of people, Ubuntu represents the most end-user-friendly non-geek-compatible Linux distribution. But there are other commercial distributions that work even harder to create a desktop experience that is, frankly, Windows-like. The two best-known of these are Xandros and Linspire (formerly Lindows). Since Xandros recently acquired Linspire, that leaves it pretty much in sole possession of that segment of the marketplace.
