I think that Alex stands a very good chance of being nominated after his 'house meeting' of a couple of days ago. As for the second person I'm not sure - a lot of the girls have been bitching about Alison so I think she stands a good chance and also, as much as I like Sandy, he is easy game for nomination by his fellow housemates, as he hasn't fitted in with the group quite as well.
Personally I wouldn't want either Sandy or Alison go at the moment, but would quite like to see the back of Alex. He is really annoyng me.