Here are some more servers you can choose from:

• jabber.org
• jaim.at
• jabberes.org
• linuxlovers.at
• jabber.ru
• jabber.org.au
• jabber.se
• jabbim.cz
• gmail.com
• chat.gizmoproject.com

For more servers visit http://www.jabber.org/im-services and for a really extensive and detailed list, visit http://www.jabberes.org/servers/.