Big real estate implications in Google IPO

One of Web's greatest lead sources to get public shareholders

Patrick Duffy, a real estate agent with @Properties in Chicago, uses search engine giant Google to score sales leads off the Web. He, along with the tens of thousands of other brokerages and sales agents who use Google, will be affected by the company going public.

Google, launched six years ago by graduate students Larry Page and Sergey Brin, today filed the papers to start the process toward its long-awaited initial public stock offering.