Ideas and business plans have no real meaning, execution is everything. Excellent quote from Paul Graham (http://paulgraham.com/ideas.html):

Actually, startup ideas are not million dollar ideas, and here's an experiment you can try to prove it: just try to sell one. Nothing evolves faster than markets. The fact that there's no market for startup ideas suggests there's no demand. Which means, in the narrow sense of the word, that startup ideas are worthless.