That's a good one. And it seems you've made the common mistake to email news@. My general advice is: Never, ever email news@. A news site doesn't cover you, a writer does. So go after writers, not publications.

This article should outline all the steps you need to follow: http://onstartups.com/tabid/3339/bid/80121/How-To-Get-Media-...

(It should be easy to get a post based on the traction you have shown above)