This is how the wrong name cost our startup $10,000 (jell.com)

tl;dr:

- Name your app after a "well-known startup with the same name" which also owns the matching .com domain.

- Notice your users aren't able to find your product.

- Buy a .com domain for a fancy new name for $10,000 and rebrand your product.

- Next time just follow pg's advice from the beginning: http://www.paulgraham.com/name.html