That's not a bad idea, because you're focusing on a segment that FB can't really aim at because it's just too small. That way, you can fulfil your customers' ne

That's not a bad idea, because you're focusing on a segment that FB can't really aim at because it's just too small. That way, you can fulfil your customers' needs better than FB could. The risk is that an app could leverage the FB environment to replicate what you're doing, or an existing health site could pop some Facebook Connect or other social aspect onto their offering...but no reason not to try. Good luck!