yup, i'm with PPs. i cosleep with DS, and DH sleeps in another room. (but we never slept on the same schedule pre-baby either.) but i also know that DH sleeps a lot deeper than i do when i'm breastfeeding, and i'm not as comfortable with the arrangement when he is in bed. i have absolutely zero worry about ME overlaying baby!
mommal's link is really good. i'll add that you want to make sure YOU are safe - no drugs or alcohol, or over exhaustion that will cause you to sleep deeper than you normally would.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.