I'm still not clear on this. Let's say I type this:
>north (moving swiftly)
Do people in the room being left see:
<x> leaves north, moving swiftly.
Or do people in the room being entered see:
<x> has arrived from the south, moving swiftly.
Or do both?
Both.
People in the room you are exiting will see your movement speed as well, i.e.
X walks north, moving swiftly.
As Delirium said, they see both (and the command emote you included).
However, there is a bit of a funny thing with the arrival message: it won't indicate the speed at which they arrived. The departing echo does, but not the arriving echo.
So, if you have 'walk' set it looks like this:
<x> moves north, moving swiftly.
<x> has arrived from the south, moving swiftly.
If you have 'run' set it looks like this:
<x> runs north, moving swifty.
<x> has arrived from the south, moving swiftly. (<--- notice it doesn't say: runs in from the south, but 'has arrived from the south'.)
If you have 'sneak' set it will look like this (if you are detected):
<x> stealthily moves norths, moving swiftly.
<x> has arrived from the south, moving swiftly. (<--- notice it doesn't say: sneaks in from the south, but 'has arrived from the south'.)
And just as a 'did you know' you can add command emotes to your flee:
> flee s (scampering away)
This will render like 'run' does.
Maybe I am just dense or maybe no one uses it but I never noticed that you could tack an emote onto flee.
Awesome.