I have been holding BA D waitlists (2 pax) on CPT-LHR for Jan '07 since about April '06. Fortunately I had set up ExpertFlyer alerts on these, so I got notified when D inventory opened. It's just now been slowly opening on different dates (when less than a month away) and the AA RTW desk is able to grab them when I see it available, and they had no explanation why the waitlists didn't clear... I guess this explains it!