i had a similar situation last week, was at a small regional airport, the md-88 pushed and started taxi. We stopped and the pilot came on PA and said they were having trouble with the communications system that talks to "the company" and he couldn't get the weight-and-balance information he needed. We would have to go back to the gate and get the information "manually" I was in F and the door never opened so I guess the ground crew must have plugged in and told him what he needed