It's great that Dell are shipping Ubuntu. Any way of making the OS more popular can only be a good thing, as in turn hopefully more time will be spent developing it and fixing bugs etc. The sudden rise in popularity of netbooks also must have been good for Linux, prompting people to look into it as a viable alternative to the mainstream.
I'm really glad that I put Ubuntu on a old laptop I got for free rather than paying some guy $90 to put XP on it which I'm sure would have been much slower than Ubuntu. And Ubuntu was free so that's a major plus
In the UK, Dell no longer provide Ubuntu on any Laptops or Desktops. But they still advertise it at www.dell.co.uk/ubuntu This is as recent as yesterday when a local LUG member tried to order a laptop with Ubuntu and was told by several people that Dell no longer provide Ubuntu. However he could buy a Laptop without Windows and they provided a free hardware upgrade at no extra cost.
They don't advertise it particularly well either; "UBUNTU is an open source operating system – so is not compatible with Microsoft WINDOWS or any WINDOWS based programs (Microsoft Office, iTunes etc )." Okay, 50% right. Itunes doesn't work, but Microsoft Office runs absolutely flawlessly on my Ubuntu laptop, and that's just one bunch of programs in a long list of "WINDOWS" based programs that will work.