Strange that I haven't really seen overeating as an ED. I've toyed with labelling myself Anorexic or Bulimic, probably because they're the most famous. So if overeating is an ED I've had it for the last 18 of my 28 years of life. WOW.
Whatever the labels are I try to see EDs as patterns of behaviour. My current pattern of behaviour is to eat huge and excercise till I drop.
When I was big there were times I envied Anorexics for their slimness rather than seeing what they were putting themselves through. Maybe anorexia and overeating are the same monster, just wearing different masks. That's just the feeling I get, don't know where it comes from.