Thanks for the good luck on my Litten hunt. The quickest hatch that I've ever had happened in Soul Silver. I hatched a shiny Bulbasaur in 30 eggs years ago. Ever since then my Masuda hunts drag on forever lol. Good luck to you on your hunts as well
you may already be aware, but if not, your surprise shiny as a gift that you're hatching for.... you won't be able to trade it to them and have it hatch shiny on their game, as the TID/SID won't correspond the way they do on your game.
Thought i would give a heads up, since you did say surprise shiny.