My biggest difficulty in using Ubuntu (or any operating system at home) is my brother's cat. It loves me. Whenever it comes in it wants my attention and marching backwards and forwards across the keyboard is a great way to make me stop what I'm doing. He's a nervous cat and if I smack him, he may decide that coming to talk to me is wrong.

Wouldn't it be cool if you could put your computer into standby just by placing your hand on the keyboard.