I spent some time checking out JBoss AS7 today. I am impressed with what I have seen so far but I noticed that good ol\' JMX-Console no longer exist.
JBoss AS7 now integrates with jconsole. So you can use jconsole as a JMX client to AS7. It also uses a jconsole add-on to provide CLI GUI in your jconsole instance.
See:
https://community.jboss.org/wiki/UsingJconsoleToConnectToJMXOnAS7
https://community.jboss.org/wiki/UsingCLIGUIWithJconsoleOnJBossAS7