2mob writes: Intel's Linux-based Moblin operating system recently got a significant user interface overhaul. The platform's new graphical shell, which was unveiled Tuesday in a new Moblin 2 beta release, delivers top-notch usability and slick visual effects. The developers have completely reinvented the concept of virtual desktops and have replaced it with a more fluid "zone" system that makes it easier to organize how windows are grouped together. The shell also has tightly-integrated social network and messaging features, such as a built-in Twitter client and an instant messenger buddy list. Ars Technica tested Moblin beta 2 on Dell netbook and has published a comprehensive hands-on look at the new user interface.