When pitching developers, App.net needs to focus on making it clear that they are offering a development platform for applications, providing much of the foundation required to build apps like Foursquare, Instagram, and Path. The built-in community also helps to decrease the barriers for rapid user adoption.
What the heck does that mean? I still have no idea what App.net is apart from a paid alternative to free social networks that frees users from ads. I think their marketing efforts should start by not speaking in such vague terms that offer no insight into what benefits might be derived and just come clean. If crafting that message is exceedingly difficult to do, I think that speaks volumes about the value proposition.