The complaint in a shareholder lawsuit against Yahoo unsealed yesterday reads like a whodunit. But my favorite part of the mystery are notes from the call Microsoft CEO Steve Ballmer made to Yahoo CEO Jerry Yang on January 31, the night before Ballmer took Microsoft's merger bid public. At one point, Yang pleads: "You don't lose anything by waiting a week." Ballmer saw right through Yang's delay tactics, saying there was no point in waiting if Yang didn't want to sell the company. See the exchange and the rest of the suit filing embedded below.