Business Profiles, online database of business registration information, provides access to its massive database via the Business Profiles API. The database contains business registrations (e.g. corporations, limited liability companies, partnerships, etc.) and additional data on shareholders, directors, public filings, and more.
Perhaps your most important online network of business contacts is now programmable. LinkedIn launched its API (our LinkedIn API profile), which allows developers to access a user's connections and anyone's profile data, in addition to several other features. Though some are saying "finally," it's clearly not too late for LinkedIn, who aims to be the professional networking platform.