DD will be 3 in March; I'm expecting a baby in June. Honestly, I'm a little nervous about it...
She has her own bed, right next to ours. Usually she'll start off nursing with me, and as soon as she unlatches (which I sometimes prompt her to do) and rolls over, DH will "transplant" her to her own bed. For a while she'd sleep right through until 5 or 6, then come into our bed for more milks and sleep, which was fine with me. Recently she seems to have regressed, though - she'll wake up crying at 1-2AM and come into our bed, where she'll spend the rest of the night. I suppose we could try to transplant her again, but DH is asleep by then and I'm not supposed to lift her, so!
We still have 4-5 months to go, so I'm hoping she'll be that much more mature and independent by then. We tried her overnight at my parents' place recently, sleeping in a big bed between my two little sisters, but it didn't work - she was getting pretty upset, and talking to her on the phone didn't comfort her, so we decided to bring her home before she got too traumatised. It's possible she'd be better with Mum sleeping with her in our bed, though... maybe?
The other option is to bring her along to the birthing centre, and just make a "nest" in the corner for her to sleep in if she got tired. She's pretty easygoing about where she sleeps as long as we're around, so that might work (assuming I'm not bellowing, but I was pretty restrained last time). A home birth would make it easier, except that we have a (male) flatmate who I think would be horrified at the idea of me giving birth while he was in the house! (He said the other day "You know, I just realised you might go into labour while I'm here" - I said "So?" and he said "It's scary! What if [DH] isn't here?" Heh. I told him it was unlikely, as DH works from home...)