How about a life-long subscription option, similar Garmin's life map-update subscription? That would possibly make those who don't like subscriptions happy. I am one of them.

Also, how about some ready-to-end-user device that may help the product start pernetrate the market? I, for one, would love a plug adapter to place between plug and socket that tells me about consumption, produces stats, allows me to turn on and off devices? I know a socket bult-in solution would be more elegant, but many of us, I think, would still love something like that to begin with. As a matter of fact, I personally would like it so much I'd buy a bunch of them from day one (of EU shipping)

Just thinking out loud.

Congratulation on the new product. I wish you succeed in establishing a sort of de-facto standard, or at least to get as popular as the product deserves.