^^^ Where is the maverick option?
As mentioned earlier, Palin will still be viable after 2008. There will be a lot of conservatives that believe McCain lost because he didn't go far enough to the right. Palin in the past week has tried to assert herself as the conservative attack dog and her base is lapping it up. All she has to do is keep doing little stories like this to differentiate herself from McCain. I doubt McCain is too happy with what she is doing but considering all the effort he's had to take to make sure that she looks as good as possible, I don't think he likes her at all because she's given little benefit and a lot of liability. It would definitely be a Reagan/Bush situation if McCain were to win.
So all she has to do is keep making a name for herself and in the true media fashion, they will forget all about her numerous fuck ups. All she will do then from 2008-2011 is go on the circuit, rally up her base, and talk about how McCain never gave her a fair shot. She will make her rounds to right wing media, The View, and any media source that is toothless, which are plentiful enough to get her message for 2012 across. Then she will garner enough popularity to make serious headway in the GOP caucuses.
I expect her to lose very easily though in 2012. It would almost be like giving the election to Obama. All Obama/Biden has to do is prove to the public and show them just how far to the right and outside of mainstream values they really are. Palin also lacks the tact to really conceal what she does. Since she has a vagina and is pretty, the media will overlook a lot of her gaffes but not all of them. She will make too many mistakes and after 2012, she will be as good as dead in the GOP.