Comcast (NASDAQ:CMCSA) announced two initiatives designed to advance the service it provides to its Business Class customers nationally and in the Chicago area.Comcast announced an expansion of its fiber network in three Chicago area business hubs: the Chicago Loop - including the Willis Tower - the I-90 corridor from Rosemont/O'Hare International Airport to Schaumburg, and the I-88 corridor in Chicago's western suburbs, from Oak Brook to Aurora. The infrastructure investment is expected to pass an additional 1,600 businesses.The MSO also announced the opening of its Executive Briefing Center in Naperville, IL. The center, which is intended to demonstrate Comcast's suite of Business Class products and services, is part of a larger facility the company opened last year that also houses customer support services, including a Customer Monitoring Center, as well as service, sales and administrative functions.