There's some really cool stuff (Epic Reports and more seamless integration between JIRA and GH) in the latest version of GH (6.1.3). We're using onDemand - when can we expect to see that version published to onDemand?
The release methodology for GreenHopper is being changed in OnDemand. This will enable the GH to be updated within a couple of days after the new version release. This is being actively trialled now and the releases should be more regular in 1-2 weeks.