Is there an installer available for JBoss 4.2.0?
If not yet, is it planned to release one fro JBoss 4.2.0?
If so, is there a release date planned we could hope to have it available?
Or a JIRA entry one could track?
Sorry, there is no plan for an installer. JBoss AS 4.2.0.GA already includes ejb3 if this is what you want. And there are general guidelines in the jboss wiki for trimming down a configuration.