Is the company "going public" soon?

A company that is making the transition from a privately held company to a publicly held one does so by issuing an Initial Public Offering of stock and is referred to as an IPO company. Tracking these companies is often tricky as they have not yet had the opportunity to establish a paper trail.

IPO Express: Powered by EDGAR-Online
http://ipoportal.edgar-online.com/ipo/home.asp
Search the most comprehensive IPO database on the web with over 4,000 IPO filings and information on over 1,500 underwriters.

IPO Central
http://premium.hoovers.com/global/ipoc/index.xhtml
From Hoover’s, comprehensive and reliable information on IPO filings, calendar, performance, scorecard, updates, and more.

The IPO reporter. (JBM 98-489)
Weekly publication covering the life cycles of IPOs