Check out Synergy (Score 1)

Latest linux Journal has article on synergy which allows you to use the same mouse and keyboard on multiple machines. I easily scoot my mouse pointer off the screen and the mouse pointer on the other machine moves.now mouse and keyboard events are sent to the second macine. There's no limit to the number of machines you can hook up this way. I have two linux boxes and my laptop all in a row using the same keyboard and mouse. The best part is that each machine's keyboard and mouse still work. So two people can type on the same machine (not at same time). For pair programming this would be ideal. Other bebbies include cut & past support and it also works with windows