Bebe - I've got 2 friends who had c/s. One waited 6 weeks to drive and the other was driving the next day. I suppose it depends what you feel up to. With a newborn, you probably won't feel like doing much driving anyway. I remember with DS the first few weeks were a bit of a blur as I was so tired. Also, he hated being in the car and had to have someone sitting in the back holding a dummy in his mouth otherwise he would scream every time we stopped at lights etc.
Angenrod - no problem about getting mixed up :-) It is a bit annoying, but I guess it's better than having no one here. It will be good to have someone to entertain DS, as I don't want to just put him in front of the tv all day - which is what I feel like doing today because I am SO tired... It will be hard trying to entertain him, catch up on sleep and tend to a newborn. Will probably have to forgo the sleep for a while!