There's a lot of overreactions on this thread! My DH and I always drank way too much a fair amount before the wee one came along, and I tried to cut down a bit when ttc, but lets be honest, these things can take ages! It's not reasonable, in my view, to completely change your lifestyle in anticipation of something that may not happen for months. I took my vitamins and cut down a bit but that was it.
Obviously I hope things work out for you sooner than that OP, but I don't think freaking out about his drinking is justified. It doesn't sound like a lot to me. When you get PG it might annoy you more, it did me when DH pretty much carried on as usual, but I think it was mostly envy on my part that I had to alter my lifestyle and he didn't!
As for when the baby's here, I'm sure he'll act differently. My DH doesn't drink nearly as much and is hardly ever even tipsy these days, although it does happen! I don't really have the urge to get pissed any more if I'm honest, got out of the habit of it, and if I start to feel tipsy I don't like it much these days!
I do think all this 'staying sober at all times in case of an emergency trip to A+E is required' is a little paranoid. I'll share a bottle of wine of an evening with DH, probably not fit to drive but perfectly capable of caring for a baby. How often do babies really need to go to hospital? It's a bit paranoid if you ask me.
This is just my experience of course. I'm just saying, I went on at my DH like you are, and I really needn't have worried.