I'm pretty sure facebook was __started__ without significant upfront cash. Obviously they got to a certain point where they needed more, but the key thing is to

I'm pretty sure facebook was __started__ without significant upfront cash. Obviously they got to a certain point where they needed more, but the key thing is to have lots of momentum when you get there. See, for example, digg.com. ~ $15 k upfront, $50k angel funding 6 months in, VC around month 10.