From Jabber.org:
Quote:
August 22, 2012: Recently, the jabber.org IM service has been subject to massive denial of service attacks related to abusive use of jabber.org accounts by "customers" of KBot, a program for cheating at the DarkOrbit game. Therefore, we have temporarily disabled new account registration at jabber.org to avoid further attacks. We will enable new account registration again once we have dealt with the underlying problem, and will announce further changes through our usual methods. Until then, you can create an account at any other public XMPP service. We apologize for any inconvenience.