Just to complicate things further, macros will soon be living on the server with your action bars - http://www.wowinsider.com/2008/09/03...puterin-wrath/

An import/export ability would be nice - even if they are on the server, at least you could set one up, export it, then import it to the others.

Edit: I KNOW that it's possible to move buttons, etc around via addons / .lua - if you've ever used MazzleUI, you'll notice that you can tell it to setup your action bars for you. I wonder if there is a way to write a quick and dirty mod that would export your action bars, and then import them ?