Hi!
I bought one and tried it...
It's Work!
I made a thermostat widget based on Mike Tanana's and Alexander Sidorenko's widget. If you replace a generic widget, it works with HG Plus.
I create a little program, which update the thermostat's "OperatingState" parameter (Heating, no heĆting), so the widget show the current status of thermostat.
cheers