That page was created by an employee of social media services provider Vitrue at 10 p.m. on Thursday--the day Sullenberger landed the disabled plane in New York City's Hudson River, to honor "a real hero." Ten hours later, there were 18,000 fans and 1,800 posts on Sullenberger's wall. By 2 p.m. on Sunday, there were more than 300,000 fans and 14,000 wall posts.

Posters range from Shazo Wazo in Brighton and Hove, England, who wrote: "Well done mate, excellent job you've done. Bloody marvelous," to Robert K. Rodriguez of New York, who simultaneously wrote: "god bless you brotha, you can be my pilot any day !!!"

Meanwhile, Vitrue's Social Media Index was showing scores for US Airways soaring since Thursday. At their peak, the airline's scores were up 171% from its December average, reaching a three-day average of plus-135%. The Index is a proprietary reporting technology that measures a brand's online conversations.

Vitrue CEO Reggie Bradford tells Marketing Daily that this "crystallizes the amplification effect social media can uniquely deliver on a cause or brand. If brands can conjure up the right mix of ingredients, there are millions upon millions of passionate consumers who will take social actions."

The first photo of the airliner sitting in the river was posted on Twitter by someone on board one of the ferries that raced to the rescue of 155 passengers and crew, creating a stir among social media fans and mainstream journalists who debated its importance in the days following the event.

"This is a compelling story which illustrates the power of how truly interconnected, influenced and inspired we are by each other's thoughts and actions," says Bradford. "From a business perspective, we think it is important for brands to take note of these passionate and engaged audiences who need a forum in good times and bad."

The amazing growth in the number of the pilot's fans certainly speaks well for the newly created Sullenberger brand. That and the story behind it are a boon for an airline that has filed for bankruptcy twice over the past several years, lost 75,000 bags two holiday seasons ago and last year became the first airline to charge for coffee and tea.

Might the favorable publicity and attendant goodwill work in US Airways' favor, or does an accident--any kind of accident--harm an airline brand?

Says Stuart Vyse, professor of psychology at Connecticut College and author of the award-winning Believing in Magic: The Psychology of Superstition: "US Airways will not be hurt as much as if the crash had had more tragic results, and a truly rational flier would consider the evidently quite skillful work of the pilot as a definite plus.

"But anything that reminds a nervous traveler of a crash is likely to be avoided. If I am right, and this kind of worry affects travelers' choices of airlines, it will be an entirely human and understandable reaction, but it seems particularly irrational given that the accident was apparently caused by birds."

This news story is important. I recommend that everyone read it.