This is a nice bombus trick to amuse your friends in chat room. So what it bacically does is that users in chat room will see shadow ids in room. Well shadow ids here means same as your id but a little difference that it will have a space before id name. To better understand try it. Here are the steps:-
1.) Login through bombus and join a room where you want the shadow ids.
2.) After joining the room highlight the room name and press 'action' and then select 'send status' in that send status 'offline'. But dont leave the room.
3.) Now, press options and select 'conference/join room' in that select the room you have entered.
4.) Now, in options select edit and in that put a space before your nick and click on join room.
Eg:- If my nick is 'jay_khetia' then i will change it to ' jay_khetia' that is a space before my nick.
5.) Now you will see your shadow id in the room you can do it as many times as you want .