By Bad Seed
This video shows my mob tower/trap producing 10,824 items/hr during a 15 minute test. The best average this trap has produced during tests is 11,510 items/hr during a 30 minute test.
I don't want to retype all the information about this trap, tests, modifications, schematics, etc... that I have already typed up; so I will just direct you to the Minecraft forum thread on it: http://www.minecraftforum.net/viewtopic.php?f=35&t=55552
Here's the link to the save file though: http://www.mediafire.com/?262n18cakdow1ct
The texture pack is JohnSmith Texture Pack: http://www.minecraftforum.net/viewtopic.php?f=25&t=29164
Plus the HD Texture Fix: