While I'm in favor of the concept behind this, I have one deeply concerning question that I'm surprised I haven't seen anyone else ask here:
Why is it called App.net?
The first 4 or 5 articles I saw about it, I ignored completely because I assumed it was some sort of app (web/mobile/whatever) framework, not a social network. They talk about the users being the customers (versus advertisers), but the name of the service is clearly targeting developers, not the users...