I literally just got my new $27 Iris Hub up and running. I paired 1 Iris Outlet (3210-L) to it and 1 Iris Motion Sensor (3326-L).
I then logged into https://iriswebportal.com/ and went under Troubleshooting -> All Devices to see my device firmware revisions as shown below.
Now I just need to cycle through all of my Iris devices to make sure they are up to date.
@srwhite - do you have a list of current firmware revisions by Iris device Model Numbers?