Not that I'd drink it, but

CHOW.com has an article about how nonalcoholic beer and wine are made. Read it here.

How are nonalcoholic beer and wine made?

Put simply, you make alcoholic beer or wine, and then remove the alcohol. You do this by distilling the beverage, as if you were going to make liquor. But rather than save the booze and throw out the rest, you throw out the booze.