Bottas has been confirmed at Williams, leaving Senna with no drive at the moment for 2013.
I don't think the win was really a fluke, I think Maldonado outperformed Senna this year. He was light years ahead in qualifying, and in the races he just seemed to be like a 2011 Hamilton clone, just putting himself in the wrong places, but he showed more raw speed. I think another season should tame him a bit more and I think he will finally put those quali performances to good use. I do think he's a bit of a cock, though.
I heard about Sutil for Force India, I wouldn't mind seeing that. Though I think Di Resta is seriously in trouble then, because Sutil was pretty good before and if he is seriously on par with Di Resta then I don't think a top team will come calling with all the talent coming through at the moment.
On the Raik/Grosjean debate... Grosjean actually outqualified Raikkonen 6-2 in the first eight races. He's definitely quick, but I think Raikkonen got better as the year went on and Grosjean went backwards. Next year is going to be a big year for him, he can't afford to drop behind Raikkonen like he did in the middle of this year.