"Spoke.com" may provide useful information for the private investigator.
What is Spoke?
Spoke allows you to find and connect with 55 million businesspeople at 2.3 million companies. Spoke reaches beyond traditional professional networks by allowing you to connect with anyone in the Network, regardless of whether they are a member. Members use Spoke to discover and grow their professional networks and connect with the right people to accelerate their businesses and careers.
What can I find in Spoke?top
Spoke gives you access to over 55 million businesspeople at over 2.3 million companies. You can find individual contributors, managers, directors, and executives at target companies along with the information you need to access them - name, title, phone, address, job history, profiles, community comments and potential business connections. Search Spoke now to start discovering businesspeople.
Where does Spoke get data?Spoke collects and aggregates information about businesses and business contacts from various sources, including:
Publicly available information: Information that is available to the general public, including the Internet.
Published information: Information that is privately owned and is not available to the general public but is available for redistribution.
Contributed information: Information contributed by members, including names, titles, and company affiliations of people. Personal contact information, including direct e-mail addresses, is not made visible through the Spoke service or via the Spoke website unless a member posts it in the directory themselves
Link: http://www.spoke.com/