Installed JBT by following http://community.jboss.org/en/tools/blog/2011/05/12/jboss-tools-milestone-for-eclipse-37-m6-indigo.
AS fails to stop, originally reported by lfryc@redhat.com
org.jboss.ide.eclipse.as.core.server.internal.v7.JBoss7ManangerException: Could not acquire JBoss Management service at org.jboss.ide.eclipse.as.core.server.internal.v7.JBoss7ManagerServiceProxy.checkedGetService(JBoss7ManagerServiceProxy.java:61) at org.jboss.ide.eclipse.as.core.server.internal.v7.JBoss7ManagerServiceProxy.stop(JBoss7ManagerServiceProxy.java:55) at org.jboss.ide.eclipse.as.core.server.internal.v7.JBoss7ServerBehavior.stop(JBoss7ServerBehavior.java:60) at org.eclipse.wst.server.core.internal.Server.stopImpl2(Server.java:3317) at org.eclipse.wst.server.core.internal.Server.stopImpl(Server.java:3284) at org.eclipse.wst.server.core.internal.Server$StopJob.run(Server.java:388) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)