Thanks for your help.
Denis, I also can see the content for http://download.jboss.org/jbosstools/updates/development/juno/ in my browser, but I tried again and still "There are no categorized items"
Max. I´m trying to install in a brand new Eclipse. It´s a clean installation and workspace. Help > check for updates asks me to uptade to Eclipse IDE for Java EE Developers 1.5.1.20121004-1506 and nothing else. Even after the update asked, I can´t see any Jboss Tools component to install.