Hmm... "Status in Japan" & "Completely Scanlated"..., very definition specific. Dunno if my suggestions led to this (if it did, then I feel all so less stupid for bringing the entire thing up), but this function should be quite useful in the near future. If anyone's bored enough, they could start by going through the list located
http://www.mangaupdates.com/showtopic.php?tid=76 and changing their completion status which I've found to be pretty reliable.