I'll answer my own question with the email response I got from Daniel:
This is something that we actually have on our to-do list and that we tend to implement. It is really hard for us to give an exact estimate when it will be ready since we have a list of small things we will add in the near future for the hub. We hope to have it released in 2 months from now.
I know this is slightly tangential to the original post, but I would like to access greater functionality, not so much by running things on the hub, but via the flicd-bridge, which I presume is running on the linux host in the hub. I use Openhab, and the Openhab binding for flic can talk to a remote linux host via the bridge. However, the bridge needs to be configured to allow it to talk outside the local host, which again I presume is locked down to the hub.
Having this able to be configured via the mobile app, or an ssh session would be great.
Just got my hub and have put it on a USB power meter.
My supply shows 5.03V
Boot up sequence draws up to 0.33A
Inactivity seems to draw 0.24-0.25A
Flic press spikes draw to 0.27A
Connecting the app spikes draw to 0.32A which immediately drops once config is loaded
Connecting to the wired network port brings idle power up to a constant 0.30A
The highest I've seen the Hub draw is 0.37A whilst messing with the app and connected to both wired and wifi
This should help you work out expected run time off a battery, keep in mind battery vendors lie about capacity and they degrade with use too!