Why should you wait for the PR to come out, in which case the whole world reacts the same time when simply digging a little deeper can give you the head start you need.
There's a service called the Sleuth and what it does is track the most important details about a company. For example, a friend of mine told me that he subscribes to it for a certain stock and one morning the Sleuth emailed him that the company had purchased a couple new domain names (web site addresses).
From that, he was able to ascertain that they were moving into a new business area and one that he felt certain would succeed.
Imagine, hypothetically, that you were holding MSFT and you got a sleuth report that they had bought the domain www.MSNauctions.com
Wouldn't that be an early heads-up that they were going to take on eBay long before the world saw the press release? Just a hypothetical of course.
It also will notify you if personnel changes are made, litigation ensues, patents or trademarks are registered, and even of rumors circulating. It also gives you the latest short interest, analyst reports, earnings forecasts, and technical trading too.
The site has been featured at the location below. Just cut and paste: