The Ubuntu Netbook Remix interface is designed to make Ubuntu Linux easy to use on mini-laptops with small, low resolution displays. It comes with a custom program launcher that replaces the normal Ubuntu desktop and panels with a series of tabs and program shortcuts. But sometimes you want an old fashioned desktop. You could just uninstall Ubuntu Netbook Remix or kill the ume-launcher process to restore the desktop. But as Ubuntu Mini points out, you can also just install the Desktop-Switcher utility.
The utility was just released for Ubuntu 8.10 Intrepid Ibex. In order to install the package, make sure the Ubuntu Netbook Remix repositories are in your repository list, and then install desktop-switcher either using apt-get or the Synaptic package manager.
The switcher will show up in your System Preferences menu, and it will let you toggle between the UNR desktop mode or a classic desktop with the click of a button.