Janice Rogers Brown?
For some reason they're mentioning her at ConfirmThem.com as Bush's big surprise for a SCOTUS nomination.
She'd be terrific. I suspect, however, that the White House will be thinking about confirmability more than about pleasing the base. (Sorry, fellow base members, nothing personal, just reality. Hard as it may be for to to accept, you are not the most important consideration here.) Alito is most confirmable after a fight, Luttig also, after a bigger fight. Brown would produce a political World War III because of her fiesty (although wonderful) public statements.
One thing I am wondering is whether Bush will nominate someone who will not be perceived as an outright reward to the NRO Corner and its fellow-travelers. I do think it's important for Bush not to encourage a repeat of such behavior but I am not sure it's as important as getting the right person confirmed.
Chris Cox, of course, would be ideal. But the White House is not calling me these days for my opinions about such things, so we can't count on that one.