The other day I blogged about a virtual desktop manager for Mac OS X - if your interested in getting one for Windows XP, you can get one from Microsoft's PowerToys download page. To enable it right click on your taskbar, goto the Toolbars menu, and select Desktop Manager.

One very cool feature in Unix / X-Windows graphical environments is that you can have multiple virtual desktops. Each desktop has its own windows, and you can move windows onto different desktops.