I'm always on the look for a good way to have my system notify me for alarm and critical events via voice or sms. My reasoning behind voice or sms is that it's more likely to be received when the signal strength for data is low. I had been using Cuube but have been testing this morning MessageBird. A much slicker interface with a fast response from email to voice, email to sms, and send to voice via the web interface. I'll now look into creating triggers in Indigo for this. IFTTT also supports MessageBird, which I'll look into, but I've found IFTTT to be rather slow - if I could buy credits for a faster response time then I would.
I also see that MessageBird has an API - figured there might be devs interested in this willing and to create a plugin for Indigo.
Simon