brent There's not a line of limited edition Dells with Ubuntus (or whatevers) for prospective laptop buyers.
Are you sure about that? Dell is one of the biggest suppliers of Linux laptops, desktops and workstations, and has very solid Linux support integrated into its Support system.
Admittedly, Dell markets Linux primarily to the business community rather than the consumer community, but that's where the market is. Developers and businesses are by far the largest market segment for Linux laptops and desktops.
We've discussed this before. Dell could develop a line of Linux consumer laptops, aggressively market them, and build a consumer support infrastructure for, say, $1-2 million per year. Do you think that Dell would see a reasonable return on investment?