Hmmm, we had a baby and moved house in the same week 6 months ago!! Ds1 coped remarkably well - he was 2.10yrs.
We talked about both things constantly, in quite a lot of detail, and most importantly, positively and excitedly. I think it's an advantage that your ds has got a good routine, because if you can stick as closely as possible to that through both changes it will give him some security.
We let ds help pack things up for the move, both his things and other household stuff, and made sure he helped unpack the same boxes at the other end. We got his bedroom set up first in the new house, put up his posters etc so it was familiar to him.
In terms of the baby, I let him choose a new toy for the baby which he brought to the hospital when ds2 was born. He came to see me every day, and we'd bought him a present as well.
He was unsettled at first - I think the house move was more upsetting than the baby - but we tried to be patient with him and he soon settled down. He still talks about the old house but prefers our bigger new house; and he's accepted his brother into the family without blinking!
Hope it all goes well for you - try not to do too much in the move yourself, just look after ds and the baby. Good luck!