The Aspire One OS is based on Linpus Linux Lite, which runs the Xfce 4 desktop environment (i.e. GUI). The default home screen has gone through a major makeover. The home screen consists of four sections --Connect, Work, Fun and Files.
Such an arrangement gives easy access to commonly used applications. One thing I liked instantly is the Search bar above these tabs, which allows you to easily search the Internet or the desktop. Also, I might add that Acer has done a good job in making the interface look attractive.
http://www.linuxlinks.com/portal/news/article.php?story=20080828135343877