I used to use Google Voice with my AHP setup. However, Google changed how things worked so I couldn't do that any more. Basically, I would send a SMS to my GV account with the command and AHP would execute it (I used an AHK script with the SDK to interface the two). Since sending an email can be done from a text message, I was hoping to be able to do that again.
I know HG has the Android app available, but it would be nice to have a way to send a message without logging into HG. I used to be able to open the text program, type a couple words, hit send, and move on. Now I have to wait for the connection which might be a problem depending on my location. With SMS I can send the message even with no connectivity and then it will send when it gets signal and a confirmation could show up later when it went through. I'm reasonably happy with how things work now, this is just a "nice to have" type feature for those times when I want to turn something on asynchronously.