Atlassian touts their product as being an Agile tool. One of the "needs" (not wants) are a way for me as PM to "nest" levels, that is, create parent-child, NOT peer, relationships between Epics, their associated Stories, and then their associated Sub-tasks. Is this available in the latest versions? I'm familirar with the Structure plugin, and yes, that is what I want from JIRA/Greenhopper out-of-the-box.