Chances are most people in the U.S. wake up to, shower to or drive by Clear Channel Communications every day. The largest owner of radio stations in the country, Clear Channel controls 900 local stations and 700,000 billboards. NOW, THE MEDIA giant intends to reach listeners through their Web browsers, too. In September the company announced the formation of the Clear Channel Internet Group. Although it didn’t give details, the message was unmistakable: Clear Channel wants to coordinate all its media properties to hold consumers from the morning drive through the workday to the evening commute.