It would be really cool if people could receive just the link to the post as a text message. I modified how Subscribe2 sends out email notices so it provides the link first. However a link shortener would be nice to throw in. So many people would rather subscribe via text. Email is becoming passe.
That way schools and others could use it as a Snow Emergency notification system etc. I also support a couple Police Departments who would love SMS vs Email.
I'm downloading this plugin and trying it on a new site to see if it allows selection of categories like Subscribe2 does. If that is not in there that would be great too.