I grew up in Pittsburgh - got the midland accent too - but we always called soda - pop, never soda, heck I think I used to wonder how soda was different from pop. Of course we had a whole lot of very, very regional words that no one else knew anyway - chipped ham anyone? Not to be "nebby" but btw - what's a bubbler??? - one thing I never picked up though was the habit of saying yins (short for you-all, equivalent to yall in the south)
found a good website www.pittsburghese.com
should be a hoot if you didn't grow up there - may just make me nostalgic