I know, another google drops my rankings thread. I have an iphone 5 site that Ihave been carefully updating with unique content for 5 months now and only submit each article to a few social networking sites. I was top of the rankings for 'iphone 5 reviews' and suddenly just before the iPhone 5 release I'm blacklisted - of course no reason is given and Google just does what it wants and does not account to anyone. I suppose one hard lesson from this is that you should NEVER depend on Google ranking for revenue.