Oh yeh, it is one of the best lines... and their facial expressions too- loved it!!
I do like the fact that they got that promo pic together, even though there were hardly any scenes with the 2 of them in (I remember right at the end Sara goes into Grissoms office when Cath is there if I'm right?), it's great that there's a pic of them both.
I am kind of pessimistic but hoping (I know that totally doesn't make sense), but I doubt there will be much new interaction, but I hope there will be, because Cath/Sara scenes, even to non shippers have sometimes got to be some of the best, and funniest on the show.
Of the top of my head 2x09 stands right out, the scene in the little shop place, and of course the man juice scene in 4x02.
And miacharlize, I think I agree, I don't know who I'd rather be at that point in time.