Well I started my students on Class Blogmeister and so far so good. They are writing a couple of stories: "The Worst Day of School Ever!" and "The Best Day of School Ever!" When they say, "I'm out of ideas." I reply, "How could this get worse/better?"
So far so good. They seem to really enjoy it, and they are using their word wall words. If this goes well I want to try VoiceThread next.