A fes weels ago in my first kegging escapade, I was rinsing out my 4 cornies with star san, and low and behold I racked my stout into the wrong keg. I happened to rack it on top of about 3/4 gal of star san solution. Long story short, I froze the keg and removed a little over a gallon of ice chips in order to get my gravity back to where it should have been. I carbed up the keg, and am drinking out of it now. The beer is not exactly where it was the first time I brewed the recipe, but still very drinkable. I have not served this beer to others, but its definitly good and has not made me ill. Let your beer ferment, freeze and remove a gallon of ice, and give it a whirl.