I seem to remember that the Y2K scare was also tied up with the 'we won't have enough champagne, either' scare. I can't recall running out of the stuff anytime in the last 3 years. At any given time there must be several *billion* bottles of champagne available for consumption, considering that a third of the world's population wouldn't even know what champagne is and another third don't drink alcohol, that's plenty left over.
However, this is not exactly true. Technically, only the sparkling wines of the Champagne district in France can be labelled as 'Champagne'. In agreements to export Australian wines to Europe the marketing of wines as 'champagne' or 'burgandy' had to be dropped. Not that this causes me any grief, bubbly slips down the throat just as easily when they call it "Method Champagnoise" and slap a picture of a koala on the bottle