I understand where you are coming from. Some of those calculations might be based on, for a lack of a better term, VC math, meaning if you are in the process of raising a series A, the VC might value your company (pre-money) at say 4 million, give you a A round of 2 million and own 50% of the company.
Depends how you define "launching". I haven't got the accounting code written yet, so revenue is still a month or more away -- but if you mean in the sense of "providing a service which people want", tarsnap has been up and running for three months.
BTW: When are you launching?