There's a thread - actually, series of threads - on math.stackexchange for people to nominate questions/answers for reponening/undeletion as appropriate. I think the same type of thread would be appropriate here, but I'm hesitant to create it since my opinion on its value may not be shared by the community here.
If there is reasonable consensus that such a thread would be a good thing, I'll go ahead and start one (or someone else can of course).