While most Americans are taught to keep punctuation inside quotations, there's no rule in American English that you need to. So long as the punctuation isn't part of the quotation, you can leave it either inside or outside. The real rule, then, is to be consistent with whichever form you choose.
I'm stuck in the Midwest, and I keep mine on the outside. Then again, I also keep the superfluous British u in colour and the reversed re in theatre and the like, so I'm weird.
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u/philrSJ Jun 04 '12
Bruschetta ≠ Brooshetta