hmm. how long can you do a /wait in macros? I do a lot of duoing with a friend, I play Monk and he plays Pally, and it would be cool to set up a second wind macro that counts down the last 10 - 20 seconds of that cooldown. It does not happen often but sometimes we may link more than my second wind can handle. I can usually keep between 50% and 100% HP but there are those time when incantations or something does a ton of damage really fast.

If I could set up a macro that was basically (second wind, wait x number of seconds, countdown final few seconds) then my buddy would be able to see that I am still cooling down second wind and hit me with a quick cure to keep me on my feet till i can heal myself.

That might be useful, and I think it opens up more applications as well. like the timed nuking.