I was a bit impatient waiting for the RADIORA2 IOT Gateway (coming in march), so I coded a quick hack to allow for me to send TELNET commands through the web using IFTTT/hook.io/etc.
Very simple... the device connects to my local lan, opens a TCP connection to the Lutron RadioRA2 controller, and then publishes a function through the Particle cloud to allow for any of the integrations to call it directly. Only one input: the command, which gets sent directly through to the telnet session. Haven't handled any error cases yet like reconnecting, but if someone wants to spend the time, please do so ;)
The code is available here (written for a Particle Photon):
Now I can turn my lights on/off with a GEO fence, and so on.
The code is extremely rudimentary (only one way), but can be improved by anyone who wants to make simple changes to allow for queries of device states and so on.
The only question I have for this community is how do you enumerate the NAMES of the devices and the ROOMS and so on? It doesn't seem to be possible with the telnet API.