No real indication that she realizes what it means yet, but she's saying it a lot, mostly when whining/fussing though ... so it could mean that she's whining for me. She does do it when she wants me to pick her up, but it won't be for sure until she says it while in a good mood too :-)
In this picture, taken November 8th, I dared to walk into the next room ... no mama ... don't leave me! If I could just get the hang of this standing thing, I could go with mommy over there! This was taken about 1 week before she was crawling confidently.