Current record: Ross McCurdy, the owner of a breakfast restaurant, cracked 32 eggs in one minute with just one hand in Kingston, Washington, June 16, 2011. As per the official rules, no shells were allowed to fall in any of the cups or bowls used for the record.
Truthfully, one of the most annoying things in life is cracking an egg. You've got to hit it just right in order to avoid landing shell in the bowl and a nasty, sticky mess all over the counter (and the floor, and the walls, and the dog …). Imagine how much messier it could be if you're trying to do it at a ridiculous pace. For this one, all you can do is practice over and over again but unless you've got an unlimited supply of eggs, this could get real wasteful, real fast.
Pro tip: if you really have your heart set on breaking this record, but don't want to spend money on eggs, pick up a copy of Cooking Mama for the Wii, and practice your technique with the controller.