\amsit etc were NOT official, but rather user made mods and were never part of JK2 (except as animations stolen from single player or cutscenes to use in MP).
In JA, you can only do emotes during Power Duel or Duel modes when you are playing. They do not (thankfully) make you invincible like they do in some of the stupider admin mods.
To use them type:
bind <key> bow
bind <key2> meditate
bind <key3> gloat
bind <key4> flourish
bind <key5> taunt
(in the console, then hit the appropriate keys to use them).
Note that taunt is the only one that works in all modes. The rest work only in Duel/Power Duel.
To see if your server is up, go into the game and check your "local" filter and hit refresh. If you see your game and can click on server info and see people there, etc then it's working.
However due to bugs in JA, it may not be displaying on everyone's in-game browser list. Apparently All Seeing Eye gets around this, gamespy sometimes does, but the in-game browser doesn't always. That's another reason I post my IP on the forums (in my Sig and in my away message on trillian) so people can add me to their favorites and always see it if they want to.