BNET (Business Net) travel blogger Brett Snyder predicts Virgin America's new presence at John Wayne Airport, coupled with Southwest Airlines' expansion of flights to and from San Francisco, will result in lower air fares between SFO and SNA, whose bustling terminal is shown here.That's crazy talk for anyone used to ponying up the big bucks to fly into Frisco (or, if you're like me, taking advantage of lower fares to Oakland or San Jose). Indeed, Snyder concedes United and American have "made a