Job openings can reveal future product or technology plans or organizational details. Some companies do not list open positions on their web sites, but may list them in local newspapers or on job hunting online sites. Try using these online sites to find openings at target companies. For example, go to www.job-hunt.org (disclosure; I am the Research Pro for www.job-hunt.org and have published articles on the site) and click on Classified Ads to access a number of sites that list jobs from local newspapers. Job-Hunt.org just won another Best of the Web award from Forbes.com so while no one web site contains everything, this site is extensive.