Shoutbox

Hello and welcome to the forum;
First of all, don't post more than once in a row when you can just edit the first post...
As for your idea for a plugin, I'm afraid unless both computers had an application installed that checked what windows were maximized and minimized and then sent the information to the other computer, this would be impossible. There is no way to get this just to happen by installing a plugin, because the information isn't sent in any way to another client...
If this kind of information was automatically shared between computers in the first place it would cause all kinds of security problems.
And why would two people install a program that relays this information. It doesn't really have a use...