Is there any app or "trick" to use Terminal to mirror commands to different ssh hosts (clusters, usually)?
I do not want to use another terminal application.
EDIT: sorry but the revision from timothymh actually made the meaning of my question to be different. What I would like is an application where I can manually issue mirrored commands to different servers while I am working on them, not a script or a system (like Puppet) to just issue known commands. That's why I mentioned that I hate those I tried (iTerm2 and so on) because of the look and feel.
I like the way the standard terminal app behaves and looks in term of fonts, keyboard mapping, way of scrolling up and down and so on.