Thanks for the feedback, guys! Eric, I'd be interested to know how those turn out. Tonsmiere's blog took some digging, but definitely has good info.
I guess I'll have to design another recipe with the intention of adding wine from the get go, because I already can see adjustments (yeast and hops in particular) to better accommodate the wine. The light clove and ginger flavors in this beer just reminded me so heavily of spices used for spiced grapes that I can't resist attempting to blend this batch.