i'm sleeping with both mine atm, and as soon as ds2 stirs i put him on the boob before he cries so he never wakes ds1. if he starts getting too upset/noisey i get up with him and we go sit on the lounge until he's settled and then return to bed. ds2 is a very good/sound sleeper now though.
so far it's going really well, not sure how it will work as ds2 gets older though, but we just take things day by day around here.