ORD Controller providing OJT described a loss of separation event during multiple runway operations involving a departure and a missed approach; resulting in two aircraft being side by side with less than required separation.

Narrative

Air Carrier Y was issued a missed approach Runway 4R. North Local Trainee issued go around instructions to Air Carrier Z at the departure end of Runway 9R to get in trial of him on a 140 heading. Air Carrier Y was issued a 090 heading from South Local Controller to get in trail then issued 120 heading. Air Carrier Y read back 090 and left the frequency. South Local was alerted Air Carrier Y did not take the 120 heading and subsequently came side to side with Air Carrier X which resulted in a loss of separation. There were a few factors that did not help the incident. 1. The center console prevented both Local Controllers from providing instant visual separation. 2. I physically walked approximately 20 FT to point the departure out (Air Carrier Z) to the South Local Controller; as I was pointing out the Runway 9R departure; my Trainee departed Air Carrier X off Runway 4L to a 090 heading. I strongly believe that if I didn't coordinate the exact location of the 9R departure a loss of separation or something more severe could have happened with that aircraft. 3. The setup of equipment by my Trainee hindered my ability to ensure what heading Air Carrier X was on. 4. New procedure in place that puts pressure on Local Controllers to climb missed approaches up to 5;000 FT. This might not have been directly related but definitely is an issue at ORD with missed approaches.