I won't be reading it, but then I don't read much contemporary autobiography. Lately I've read biographies of Theodore Roosevelt and Winston Churchill (and am just finishing one of Rudyard Kipling - see sidebar). The youngest of these died fifty years ago; that's about the right degree of marination to put historical figures into proper perspective. Palin's significance at that remove is likely to merit her at most a paragraph in the lives of the truly influential people of our age.
That said, I'm not a harsh critic of hers. She's a populist with solid conservative underpinnings. She primarily appeals to a different demographic than mine, but her appeal can still be a valuable part of the conservative movement.