I'm curious to hear more details about your "tipping point". What sort of metrics seem to put investors at ease? Was it a specific revenue goal, a more polished plan of action, a certain user-growth model, or all of the above? My limited experience from working at a consumer internet startup has taught me that once you hit about a million users, everything else seems to fall into place a lot easier. Of course that varies widely depending on the business, so I'm just interested in hearing other data points.