I did the same thing with a SMaSH that got infected due to a dried out airlock. I was going to dump it but my fiancee made me keep it so we added 3lbs of raspberry puree and Wyeast lambic blend and its been sitting for about 3 months now. Haven't tasted it yet but I might in a month or so.
Primary: Apfelwein, Raspberry Lambic, Experimental Wheat cider, IPA
Keg 1: Hefe
Keg 2: Irish Stout
Keg 3: Peach Kolsch
Keg 4: Empty
Bottled: Bourbon Vanilla Porter, Chocolate Stout