Got this in my email today and thought I'd share for those who are always concerned about the temps of the meat they cook. This guide will also help you to get your steak cooked exactly the way you like it! =)

BeefRare
USDA Guidelines (Before Resting): n/a
Professional Kitchens (Before Resting): 115 degrees
Medium-Rare
USDA Guidelines (Before Resting): 145 degrees
Professional Kitchens (Before Resting): 120 degrees to 130 degrees
Medium
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 140 degrees
Medium-Well
USDA Guidelines (Before Resting): n/a
Professional Kitchens (Before Resting): 150 degrees
Well-Done
USDA Guidelines (Before Resting): 170 degrees
Professional Kitchens (Before Resting): 155 degrees to 160 degrees
Ground Beef
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 160 degrees

PorkMedium
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 145 degrees
Well-Done
USDA Guidelines (Before Resting): 170 degrees
Professional Kitchens (Before Resting): 160 degrees
Ground Pork
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 160 degrees

PoultryWhole Bird, Thighs, Legs, Wings, Ground Poultry
USDA Guidelines (Before Resting): 165 degrees
Professional Kitchens (Before Resting): 165 degrees
Boneless Chicken Breasts
USDA Guidelines (Before Resting): 165 degrees
Professional Kitchens (Before Resting): 160 degrees

Lamb
Rare
USDA Guidelines (Before Resting): n/a
Professional Kitchens (Before Resting): 110 degrees to 115 degrees
Medium-Rare
USDA Guidelines (Before Resting): 145 degrees
Professional Kitchens (Before Resting): 130 degrees
Medium
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 140 degrees
Medium-Well
USDA Guidelines (Before Resting): n/a
Professional Kitchens (Before Resting): 145 degrees to 150 degrees
Well-Done
USDA Guidelines (Before Resting): 160 degrees
Professional Kitchens (Before Resting): 150 degrees to 155 degrees
Ground Lamb
USDA Guidelines (Before Resting): 170 degrees
Professional Kitchens (Before Resting): 160 degrees