It would be useful to age the data so that as Blizzard changes drop rates and which mobs drop what, the tables here adapt over time. Older data should have less weight than recent data.

Example: Quest "Nothing but the Truth" (http://thottbot.com/q1383) used to require a drop from a Desolace Deepstrider giant, but the quest has changed to require whelp blood from the green whelps of Swamp of Sorrows. Thottbot hasn't changed to reflect this change in the game, so the Deepstrider's are shown as dropping the whelp blood, and the drop rate on the whelps is shown as close to zero. (I got the drop after about 6 kills.)