<factory scope="stateless" auto-create="true" name="identity" value="#{org.jboss.seam.security.identity}"/>
Oooookay, that not that helpful, but at least it's true to the Java meaning of "Go To Declaration".
However in that case Ctrl-Shift-B should also work and should take me to the class org.jboss.seam.security.RuleBasedIdentity