This topic popped up for me again today, and since it was originally started, Fibaro dimmer is now available in the US as well as the EU. It’s an in wall micro and does not require a neutral wire if it is just for dimming a light source below 8 A. It can be used with a regular switch for on/off or a momentary/retractive switch for dimming as well. It’s become very popular with UK members because so many of the homes there don’t have neutral wires at the light switch. There are a number of different models, but the relays (just called “switch”) do require a neutral, while the dimmer modules do not.
In the UK, Vesternet sells the full line:
In the US, the 212 dimmer model is available from a number of different retailers:
The device is somewhat different in the two regions, including having a different zwave frequency, so make sure you buy the one that is compatible with your hub. It’s also fairly expensive compared to many switches.
Also there are a lot of differences between different models, including different required wiring patterns, so make sure you know which model you are looking at. (And I’m not sure if the Fibaro 211 was ever manufactured on the US frequency. But the 212 is available on either.)
The following discussion thread goes into some of the wiring issues.
So this isn’t just a matter of swapping out a switch, but it’s definitely worth knowing about.