I'd always wondered if you could use WordPress and RSS to micro blog and then create some kind of aggregation app. I guess replying is a harder problem to solve than posting. But I'm glad someone's attempting this.

John Saddington's Pressgram was kinda in this field, right? Pressgram failed because it cost him too much to run the servers, so I hope Manton's business model works out better.

I'm intrigued about discovery and search. These are almost certainly top features of Twitter: it's easy to find people and things. I wonder if and how these will be tackled in the app.