Originally Posted by MSK
Not really only thing I can think of some would say bite inhibition but, you can teach that. Like K9Performance said as long as you treat the pup as what they are a dog you shouldn't have any problems. Make sure when playing with the pup to correct when its being to rough. Things of this nature is what they would learn with their siblings and mother.
That Developmental Stages page looks like it is gone, but here is another great one about Canine Developmental Stages
+1 on the correcting rough play with the pup too. We had this issue early on and 'yelping' or a good growl/hiss when the pup gets too rough while mouthing your hands is similar to the reaction they'd get from their mother or littermates.
Some people prefer to discourage all
mouthing, but personally I think that doesn't allow them to learn the difference between good mouthing (play) and bad mouthing (rough play or nipping that can break skin). Dog personality can be a factor here too though, so take it on a case-by-case basis.