the time to pull the plug is a good question. we are nearing our second year, though only in the past 4 months have we both been working full time. as the product and community matures we will either transition from savings to sustainability, or else move to more sustainable work while still pushing the startup forward on the side (not so many new features, but often the social and entrepreneurial advances are more a matter of timing and connections. constant strategic effort, not full time effort). we'll see though.