On a side note, I wonder if a lot of the services listed here are really startups. Some of them have an amateur feel to them - there's nothing wrong with that - it's just that startup doesn't seem to be the best description for a lot of the services listed here (and not because they don't have any VC funding). If we take a polished piece of commercial software as an analogy for a startup, then some of these projects are more like shareware. ("shareware as a service")

just to be clear: I'm not criticizing the services here. Some look very useful and as the owners have said are already profitable. I'm just interested in how others define a startup and whether or not people think that term fits these ideas. How exactly do you define a startup?