I've been using MightyText in beta for months. It doesn't resemble iMessage in any way, and it's not supposed to. I have no idea where the headline came from. It's not an IM service. It is, simply, an app for sending and receiving text messages through your phone from a PC. So if you're at a computer and you receive a text, or you want to text someone, instead of taking your phone out of your pocket and using the little screen and the little keyboard, you do it right on the computer. Simple, useful, end of story.