Flight Wisdom's blog shares their LGA Southwest experience:

Flight #614 was scheduled to depart New York’s LaGuardia Airport to Chicago-Midway Airport at 8:45AM with an arrival time of 10:40AM.

Customers lined up in typical Southwest fashion, by boarding letter and number in front of spaced steel columns.

The first passenger, holding Boarding Group A, Position 01, was Darrell Johnson, who had purchased a Business Select seat and was connecting in Chicago to Sacramento.

to read more, visit: http://blog.flightwisdom.com/2009/06/30/boarding-the-inaugural-southwest...