You are right, the Z-Wave stuff won't be of use for you unfortunately.
I did briefly look at getting a Connexoon when I was getting my Somfy motors, but one of the guys on the Auz/NZ thread was talking about the Bond bridge and it looked interesting. Here's a link to it on Amazon.
It is a hub that plugs into your router / modem for communication via their Bond app, but then talks to devices via RF, including Somfy motors. You can connect your blinds and other devices in the app and then issue commands via the app, schedule actions, etc. I don't use the app very often, I set everything up on my HE hub using the Bond integration developed by another developer here on the Community.
The Bond bridge can also learn commands from RF remotes for almost any device, except those that use a rolling code like Somfy, Bond have to develop those specifically. This was one selling feature for me as I felt the Bond bridge offered me more flexibility to use with other devices down the track, compared to the Connexoon, though I haven't had a need to use this yet.
All that said, from memory I looked up the Connexoon and I thought I remembered an API you could hook into. I'll try and find it for you....
EDIT: Yes, there is one...
https://developer.somfy.com/apis-docs
Looks like it calls out to the web, which is not ideal, but not a deal-breaker for something like blinds. That was another selling point of the Bond bridge was the locally run commands, I don't believe there is any external comm's when using the Bond bridge.
It does use OAuth2 for authentication, which is something I am vaguely familiar with but have not needed to develop in as yet, but there will be others on the Community that have, so not impossible by any means.
If you want to go down the Connexoon route I'm sure we can get it working on your HE hub.
