So, for those of you who are interested, the app (PowoMeter) is now in a working state and freely available. see
Powometer connects to the Wattson Energy Monitor and records your energy usage. It is far superior to the Holmes software from DIYKyoto that comes with Wattson. :)
For now, the installer is a bit crude and requires some manual work but the instructions are there and fairly clear.
Until I find more time (or willing helpers) the site is functional yet not to pretty. If anyone wants to lend a hand, I would appreciate the help.
I am currently busy on the online version of powometer. This will allow you to view your usage (or the collective usage) online in near real time.
Cheers, Crispin