I don't live in a place where VC funding is likely and I don't have a partner. I'm also not good at web design nor do I have good contacts among top web 2.0 bloggers.

And from my startup prototypes so far, I have learned that most users have very little patience, understand little, and generally don't contribute much.

For these reasons, toy Facebook apps seem to be my best bet. I also like the idea of playing with people's minds, easily tweaking things here and there to see what sort of psychological/sociological impact they will have, etc.