I am running an emulated sugar enviroment off of ubuntu. My Jabber server is set to xochat.org, but I still don't see anyone. I know I am connected to the internet, because I can browse the internet. Why can't I see anyone?
What Sugar emulator are you using (Jbuild ?, which may not work correctly with jabbers) What version of Ubuntu ?
If you are not using Sugarlab's Sugar-on-a-Stick (SoaS), try the Blueberry version download at sugarlab.org. It boots and operates from a USB thumb drive without changing the existing software on your computer. Then use jabber.sugarlab.org as your "mesh server".
What times are you connecting to the Jabbers ? There is almost no activity in the "wee hours of the morn" (EST), even if it is noon in Australia.