It's pouring rain outside, but in a green room at the "Today" show's Rockefeller Center studios, the sun is shining in the form of Barbara Corcoran. Cue cards? Check. Coffee with cream and copious amounts of sugar? Check. Almost every Friday, the pixieish real estate queen with the short blonde hair comes here in her shiny, fluorescent suits and delivers her ebullient shtick about what a great time it is to buy a home, recession be damned.