This ^ I've managed sites with nearly 99% of traffic coming directly from search engines and some as low as 5%. It correlates directly with the type of site

This ^ I've managed sites with nearly 99% of traffic coming directly from search engines and some as low as 5%. It correlates directly with the type of site you are managing. If you are targeting a very specific niche community, you would likely receive much better results injecting yourself into that community and becoming an authoritative figure and focusing on direct marketing then an all-out SEO campaign. However, if your selling cases for the iPhone 4, your much better off with focusing all of your efforts on conquering the top spots on Google.