Well, it's about time, frankly. Via the BBC :

Computer maker Dell has chosen Ubuntu as the operating system for its range of Linux computers for consumers. 

This makes me happy for a lot of reasons. For one, it's Ubuntu, which I use all the time and on whatever systems I can and second – and probably more importantly – it means that someone is offering Ubuntu as a no-effort-to-install system to consumers, which rocks my socks off.