Again, even more reason why that makes no sense. If the Feds were going to do anything, it'd be well after the holiday. There's no reason to put together a poorly written, incoherent resignation speech in a hour or so, other than this is just Sarah Palin being Sarah Palin.
Not to mention, she gave no inclination from her speech that her intentions are to lay low.
I think this is a political gaffe and a poor move, but I don't think it's a panicked response to a possible indictment simply because there really is no urgency.
Also, if she truly believed a federal indictment was coming, this whole resignation speech would reek even more retroactively and she'd come across as a total liar.
I just don't think the scandal is there. I think she couldn't take the political pressure and is being wacky Palin.