it is first and foremost meant to be a tool that is useful even if you’re the only one using it (PDF organizer); the network effects will come later and naturally. I plan to blog more extensively about this idea since I hadn’t thought about things in that way before, and it really makes a lot more sense, especially when your target users are scientists. It will be much harder to build a network if you bill it as such, and perhaps much easier to build a _tool_ that doesn’t depend on a network (but has the potential to become much more once the network is already there).