Ubuntu's Netbook remix offers a one-app-at-a-time, no-border view that readers like Duane find very handy. You can get a similar no-menu, no-border effect by quickly installing the package "maximus" in Ubuntu.
Maximus simply takes away the top window borders and side scroll panels from any app in Ubuntu while it's running. If you need them back temporarily, you can hit Alt+Space+X to do so. You can do like Duane and add Maximus to your start-up applications if you're regularly looking to get a one-app experience or simply fire it up when you need it. It's available in the repositories for all the major Ubuntu variations.