Portfolio editor Joanne Lipman is to ring the stock market's opening bell tomorrow morning at 9.30am, to mark the first anniversary of the Conde Nast business magazine. It's a distinct honor for Portfolio, or would be-but for one detail. Lipman will be kicking off trading not on the real floor but on the Nasdaq electronic exchange. The ceremony will take place at the Nasdaq's unpopulated "market site" round the corner from the magazine's offices-before an audience of bewildered Times Square tourists. (Easy dig: they may represent the confused business title's target demographic.)