It's not just spring training for baseball. On March 14, donors will be warming up for the New York Yankees' No. 1 fan, former Mayor Rudy Giuliani. Insiders say he's hosting his first fundraiser, the "New York City Home Team Reception." A baseball theme will rule: The $2,300 price will include Cracker Jacks, hot dogs, and a Rudy '08 ball cap. The entertainment: the Yank's organist and Irish tenor Ronan Tynan singing "God Bless America." And depending on the amount, donors will be categorized as "team captain," "most valued," "all star," and "slugger." How big a fan is Giuliani? Pollster Frank Luntz, who's been to games with Giuliani, tells us, "The most dangerous place anywhere is the space between Rudy and the Yankees."