Here are some more servers you can choose from:

• jabber.org

• chatme.im
• gmail.com
• jabber.org.au
• jabber.ru
• jabber.se
• jabberes.org
• jabbim.cz
• jaim.at
• jappix.com
• linuxlovers.at
• livejournal.com
• ovi.com

For more servers visit http://xmpp.net/ and for a really extensive and detailed list, visit http://www.jabberes.org/servers/ or http://list.jabber.at/.