Congratulations Kerry - you must be so pleased to be getting them home!
We did much the same as Throckenholt with ours; if the twins get used to being fed together, it means you get a bit more sleep and you're not constantly feeding. If we were both up, we'd take one each, but during the night feeds we took it in turns to do them both at once. I had a small sofa in their room and would prop one in each corner (well supported), then sit in front of them and bottle feed them at the same time. Then do the winding and a cuddle afterwards.
Another way was to put them in their little Rock-a-tot car seats then sit in front of them to feed them - they are at a good angle in those little chairs and wont slide about. Feeding in tandem like this is a bit like patting your head and rubbing your stomach at the same time to start with, but you get good at it and cope with little differences between them ie one may go slightly faster than the other, or one may prefer a little rest now and then. I used to feel though that feeding them like this was dipping out on a good chance for a cuddle that single babies usually get when they feed, so I always talked to them when they fed and made extra time for a cuddle afterwards.
They got into the routine of being ready to feed at more or less the same time, and yes, I would wake one if they weren't up, because you could bet they would be ready any minute if they were due to be fed.
Will you have them in the same room? Mine are, and I was concerned at first that if one was crying for some reason (and it was time for them to be asleep) the other would be disturbed. I haven't found this to be too much of a problem though and one could be yelling the house down, but if the other is ok they just carry on sleeping through it somehow. In fact, atm they love being together (now 3yrs).
Wishing you lots of luck - oh, and if possible, get the largest steriliser that you can, as the more bottles you can do in one hit, the better!