I’ve been saying for years that ideas are a dime a dozen.  It’s not
great ideas that make great money, it’s great execution.  My son sent
me an excellent link to Signal Vs. Noise Blog entitled “I had that idea years ago!”
The premise of the piece is that we all see “other people getting rich
off an idea” we had long before they did.  This well-written post
explores the idea that just because you had an idea doesn’t necessarily
mean you would have had the same success as the person currently
working the idea.  I highly recommend you read this article.  It’s
short, well-written and worth the time.   The comments (some lucid,
some not) are worth flipping through as well.