So I found this story on Chicago's Fox affiliate website. If you don't trust Fox reporting (who can blame you) here is a story from left-of-center Mark Blumenthal that says basically the same thing. In it, they raise two items.
First, that the motive for Palin's sudden resignation is that she is about to be accused of an making an illegal deal with an Alaska construction company in which her large home was built using their materials (for free) in exchange for then Mayor Palin granting the company the contract for the over sized sports complex that wrecked Wasilla's finances. This story has been around for a while. Indeed, it was one of the first series of negative stories about Palin way back in August of 2008.
The second item they raise is that there are rumors coming out now that Palin has told her close friends that she is dropping out of politics entirely.
Dr. S. I agree with you about politics most of the time and even when I don't I respect your positions (even if I can come off a bit dismissive rhetorically). That said, I do think the time may be coming when you will have to concede that McCain's appointment of Palin as his running mate was not visionary, bold, or a "hail Mary" but rather a desperate, ill considered and irresponsible decision by an ambitious man with poor judgement and a mediocre mind. She is about to be shown to be, at best, a thin skinned prima donna who can't stand the heat on the national political scene (compare her response to press criticism to Obama's response to the Rev. Wright scandal). At worst, she is a hypocritical, corrupt and not very bright local politician who rose a level or two beyond that of her competence because of her looks and public speaking appeal.