Microsoft’s much-anticipated Jerry Seinfeld ad campaign is live on the Web. The first installment features the comedian and Microsoft Chairman Bill Gates shopping at the discount-shoe outlet – and nary a mention of the Windows Vista operating system the campaign is trying to save.

The 90-second ad is basically a showcase for Seinfeld’s observational humor and Gates’s penchant for self parody. Gates is buying a pair of shoes at Shoe Circus, where he is a platinum member of the clown club. Seinfeld, who is eating a churro, walks by. Hilarity ensues, and then in the ad’s closing moments Seinfeld asks Gates if Microsoft is ever going to make our computers “moist and chewy like cakes so we can just eat them while we’re working?”

And that’s it. No mention of Vista, no mention of Windows.