While it shouldn't exactly come as much of a surprise, a post on Dell's IdeaStorm site confirms that Dell systems pre-loaded with Ubuntu
are, in fact, cheaper than comparably configured Windows-based systems -- about fifty bucks cheaper, to be precise. In the example given on the site, a Dell Inspiron 1420 laptop loaded with Windows Vista Home Basic Edition totaled up to $824, while an otherwise comparable system with Ubuntu installed rang up at just $774. A Dell admin on the site later added that " on average, comparably configured Ubuntu systems will be about $50 less than Windows systems." Of course, as The Inquirer points out, $50 ain't that bad a deal for Vista, even if you just use it for the occasional non-Linux app or game.
[Via The Inquirer