While I’m puzzled why they started with Windows Phone first, I am glad that they are in the process of creating an iOS app.
Now I know what you’re thinking: Why not Android/iOS/Blackberry? There’s no conspiracy theory here — it’s simply because we could. This project is a very early preview into what you’ll eventually see from Disqus across all major mobile platforms. With this first step, we’ll be gaining feedback that will be incorporated into future mobile product releases. (Disqus Blog)
This should make it easier to moderate comments upon my Tumblr blogs! 🙂