OK, it wouldn't begin to be an explanation for her accent, but let's keep an eye on the stories flooding the internets that Sarah Palin used to (?) attend a church that practiced speaking in tongues. I doubt we will get audio on that, but she may prove to be more linguistically interesting than we realized way back when we started this thread!*
* If you're into the 'Palin accent' thing, definitely go check out the comments on those post, including the latest, a really good one by Wayne Leman.