Spoiler Alert: Don't read below unless you want to know. Well, "my people" say that the ballons are actually used to drop supplies to the others. One of these shipments will be intercepted. No "others" are waiting for Sayid and the gang but Kate and Jack do leave to find them after what Henry said in the hatch. We also find out that Locke's Dad, Cooper I believe is his name is the real Mr. Sawyer and that Helen and he have been working together to con Locke. It looks like Henry was in another episode of LOST before we meet him. Remember the guy changing the light bulb at the Hospital that Hurley was in? It looks alot like Henry. Same mole on the cheek and the wierd eyes. Maybe the producers just liked his work and gave him a bigger part.