The particular dialectal feature Eric Baković notes at Language Log is not confined to Louisville. My wife and I have somewhat frequent discussions about whether she’s looking for a “pen” to write with or a “pin” to sew with, and she’s not even from the same state. (She’s from Kentucky.) (And if you’ve ever lived in Louisville, you know what I mean.) It’s the same with my relatives in Bell County, Kentucky. I’ll have to double-check my parents, though. They’ve lived in Michigan so long their accent has drifted some—although not by much.
What I really wish Eric had explained, however, was how one manages linguistically to condense “Louisville” into two and a half syllables!