Dear Dan and community,
I do not think that there are much doubts that what is needed is a 220V/50Hz version of the latest 2Way products. Both computer interface and modules. What is available from X10.uk is old stuff, not speaking about the price.
What I have seen on the various forum is that the electric conversion is not a bit industrial issue, so why not proposing 220V/50Hz system. The software could remain in english for a while, most early adopters/web/techno fans read english enough.
In terms of market maturity, see the roll out and the conusmer adoption of hogh speed DSL internet access if you still have doubts.
If distribution channels are the Pb, Ebay is a solution for the start and as your products will become popular, you'll see many distributors happy to sell your stuff.
If capital investment is the issue.... let's talk. I cannot imagine that such a problem should stand in the way.
On this side of the Atlantic, the level of frustration is high. We are all passinate about your products. Do us a favor, give us a date when we will be able to have AHP, the computer interface (two way) and the main modules available.
Respectfully.
Pierre