Wow! This post has touched a few raw nerves!
In the book my gp gave me, if you follow all the current SIDS advice; that is having the baby in the same room as you (not in the same bed) for the first six months, not smoking at all, not drinking and not gaving pets in the same room as bub is sleeping in, the risk currently stands at 0.007%. By putting your baby in his/her own room, this risk doubles. To 0.014%. So it's up to you, really. I wouldn't condemn you for it though, it's your choice. Far, FAR worse would be to carry on smoking I think. As for the co-sleeping idea; I'd be worried about rolling onto my baby and suffocating him. In that instance, I'd actually rather put him in his own room. But again, that's personal choice. Here on mumsnet; I've noticed co-sleeping is almost encouraged, yet I asked my midwife about it (didn't know what it was; dumb first timer!) and she looked positively shocked and obviously really frowned upon it. So I highly doubt, as one poster suggested that you'd have to 'justify' yourself to a midwife or hv standing in your house. If the healthcare professionals taking care of me were that judgemental towards me and my parenting decisions; I'd show them where the door was!
Personally, I've got a Moses basket in our bedroom (space is tight) and a cot in the nursery. I'll make the right choice for both of us, at the right time. If that means I want to put him in his cot week one, day one then that's up to me and for no one else to judge. So yes OP; I'd say it is possible as long as you're happy with your decision.
gherkins if you want to have baby in with you, then to save you the trouble why not get a few little storage baskets you can put the essentials in (nappies, wipes, cream, clean clothes etc) and a cheap spare changing mat or towel, slide the lot under your bed and then when the tome comes at night; you're not traipsing round the house looking for stuff? Waaay too much effort! I've got a 'kit' like that for my living room because there's no way I'm dashing upstairs every five minutes for clean clothes/nappies/bibs or whatever! Although I guess it's one way to get fit...
Lastly, can I just say that I get that people have really strong opinions on some topics, but that there's really no need to flame other people for them? The OP has disappeared and that's sad. She, like many of is are first timers and have loads of questions, some of which might seem really obvious to some of you who've got kids already, but for the rest of us mere mortals; we're just muddling on through like you did at one stage. So please, if it's an emotive topic for you, answer the question and move on. Some of the sarcastic and mean comments on here are totally unnecessary from both sides of the debate.