Let the campaigning begin: Microsoft hosted a conference call with the Street and media this morning to talk over its $45 billion dollar hostile bid for Yahoo, making its case not just to Microsoft and Yahoo investors, but to Yahoo employees who might feel tempted to make a bee-line for the exits.

As Yahoo fumbles around with a pat statement that the board is reviewing the offer and will do what's best for shareholders, Microsoft launches a calculated, scripted conference call featuring all the company's top brass: Steve Ballmer was joined by Kevin Johnson, Ray Ozzie, Chris Liddell, and Brad Smith, the heavyweights you'd expect on a deal of this magnitude.