Whispers

Can you whisper multiple people at once? Or do I have to post a whisper multiple times to each person that can hear it, separately?

If you whisper to a character, every player with control over that character will receive it. You can create a dummy character and give multiple people control of it to whisper to that group all at once. A common use of this feature is for multiple languages; for example, create an "Elven" character, and give all players with a character who can speak Elven control of the Elven character. When an NPC speaks in Elven, have the NPC whisper to the Elven character, and all the players who can understand Elven will hear it, while the players who can't understand Elven won't.

Ah, very cool. Thank you.

I use this very technique for all my languages in a macro form. Make this as your macro text, changing the key words as needed. /w Elven ?{speach} /desc @{selected|token_name} says something in elvish. In this example I use Description for role playing, but you could use /me and /emas as well.