It would be nice if you could add a feature, configurable or not, that would send keep-alive messages in the background. Currently if I have a window that is inactive for a period of time, it becomes unusable. Putty for example has this feature. My ubuntu linux box at work, the default terminal just stays active. I didn't have to configure anything. It would be nice if this would just be the default behavior. Putty you have to remember to set it, which can sometimes be a pain.