Don't know why but this reminds me of a Richard Stallman quote
"To understand the concept of free software, you should think of 'free' as in 'free speech', not as in 'free beer'."
Innovation comes in many forms... just because someone has made something already doesn't mean you can't improve on it. Companies like Google, Microsoft, Apple etc... give startuppers a platform, an idea to improve upon or a hole to fill.
Your life is an representation of cookie cutter, no? Starving entrepreneur, writing on his ghetto web blog like a million other people trying to be...unique? If I were you I'd get over the rejection of your last interview, lift your head high and move on.