
Hold down two buttons for 3 seconds to make it play a bit faster - what is this, a nuke silo?

Also I saw a Mac that does not have an ALT key. (wat)
And then there was this

http://zero-k.info/Forum/Thread/3257
but your favorite mod does not have enought chili.
But now and new, the same functionality in slick rectangle style:

It sticks to the left side of the screen, where normal you have the buildmenu. When a unit is selected it hides so one can look at buildqueues or whatever.
Click the numbers and replay plays at that speed.
The thing at bottom is play/pause toggle.
If playback has not started yet, you can click "skip" to skip the pregame phase where everybody is doodling on the map.