Robin Good: If you are looking for a few examples of successful, self-funded startups, I have put together a small but growing collection of web companies that have reached profitability and success online without resorting to any form of initial funding or seeding by banks or venture capitalists.
Here they are:
http://pinterest.com/robingood/successful-self-funded-startups/
P.S.: If you know of other companies that should belong in this list do not hesitate to suggest them for inclusions.