I had a bit of mold after lagering a helles last spring. Just a eensy bit. I racked from underneath immediately (it was ready anyhow) and kegged it. I was crazy sanitary and made sure nothing that was going into the keg came in physical contact with it. I left nearly a gallon in the carboy because I didn't want to stir up the mold. Anyhow, kegged & carbed & stuck in the fridge. It wasn't great in July but I had a pint last week and its getting nice. I think its worth a try. Oxy nuke everything afterwards & if it tastes like a$$ after a few months, dump it.
*edit* I'm a firm believer in "nothing in beer can kill ya" & "don't dump it". Or, at the very least, give it every opportunity to redeem itself before you do. cheers.