A tipster reports overhearing two Facebook employees bragging about the Jack Spade computer bags bought for them by their employers. Facebook has some 700 employees; the Spade bags retail at the Apple Store for $99.95. If you figure Facebook got them for about half that price, it still shelled out $35,000 unnecessarily. Is this the kind of spending CFO Gideon Yu is trying to persuade Middle Eastern investors to underwrite?