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It was published in Avon Calling #2.
Reactions and Reviews
(A/V + alternate A/V), Orac messes about w/ the nature of reality or something, & we get the parallel-universe versions of Avon & Vila getting mixed up w/ "our" ones. In the parallel universe the classes are reversed so Delta Vila is above Alphas Avon & Blake. I don't think it's done as a joke (I may as always be wrong...) but what w/ the role-reversal, Blake as Vila's sex toy, & multiple orgasms all over the place I don't find it at all convincing. 
Pretty fun mirror universe fic where Captain Vila (who is married to a demur and servile Avon) is swapped with our Vila and the two AU versions basically convince our A and V that they should be together. It's anti-Blake (he had to be chased away from Avon by AU!Vila), but ultimately the fic is larky enough (rather than serious) that I don't mind too much.